Book 1

Rainbow Days, Vol. 1

by Minami Mizuno

Published 19 January 2023
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Excited to have plans on Christmas Eve, Natsuki feels like he’s finally catching up to his friends who are in relationships. But when the night doesn’t go as expected, the stage is set for falling in love.

Book 2

Rainbow Days, Vol. 2

by Minami Mizuno

Published 16 March 2023
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Natsuki, Tomoya, and Tsuyoshi make progress in their respective romances. A girl confesses her feelings to the recently dumped Keiichi, but is she prepared for his role-playing proclivities?

Book 3

Rainbow Days, Vol. 3

by Minami Mizuno

Published 11 May 2023
Four male friends support each other through the colourful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Tsuyoshi is busy trying to finish drawing his manga before a big summer convention, so Natsuki, Mattsun, and Keiichi go to his house for the night to help. Can he make the deadline, or will his three friends cause even more chaos for him?!

Book 4

Rainbow Days, Vol. 4

by Minami Mizuno

Published 6 July 2023
Four male friends support each other through the colourful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Is love in the air for Keiichi at last? A beautiful school nurse has captured Keiichi’s heart. But his older brother—a teacher at Keiichi’s school—is fiercely against the match!

Book 5

Rainbow Days, Vol. 5

by Minami Mizuno

Published 14 September 2023
Four male friends support each other through the colourful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centred playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Relationships progress as everyone sets off on an overnight trip to an amusement park. Natsuki and Anna find themselves alone together in a rising Ferris wheel cabin…!

Book 6

Rainbow Days, Vol. 6

by Minami Mizuno

Published 9 November 2023
Four male friends support each other through the colourful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centred playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

The overnight trip to the amusement park has brought Tomoya and Mari closer together. Tomoya is hoping to take the next step with Mari as the school sports tournament heats up, but when she catches him in a compromising situation, things start to go sideways. Meanwhile, Natsuki prepares for a Christmas Eve date with Anna...!

Book 7

Rainbow Days, Vol. 7

by Minami Mizuno

Published 18 January 2024
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Ever since Natsuki kissed Anna and collapsed with a fever on their date, she’s been anxious to find out what was on his mind. When she finally hears from him, she’s shocked to learn that he can’t remember a thing!

Book 8

Rainbow Days, Vol. 8

by Minami Mizuno

Published 14 March 2024
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Nozomi may have been rejected (apparently) by Keiichi, but her feelings are stronger than ever. Newly determined to win his heart, she enters Seiryo High. Meanwhile, her older brother, Mattsun, has his own high school love troubles! As Natchan and the gang start their third year, they reminisce about how they all became friends…

Book 9

Rainbow Days, Vol. 9

by Minami Mizuno

Published 23 May 2024
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

The gang sets out for their senior trip to Osaka and Kyoto! With Mocchi from the basketball team planning to ask Anna out during the trip, Natsuki decides to reveal his feelings for her too, but can he find the right moment? A white-hot battle of hearts over Anna ensues!

Book 10

Rainbow Days, Vol. 10

by Minami Mizuno

Published 4 July 2024
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Mocchi from the basketball team has asked Anna out! Afterward, Natsuki finds himself helpless in stopping his friendship with Anna from becoming awkward… Meanwhile, Mattsun notices Mari’s feelings are gradually changing, so he decides it’s time for them to have a serious talk!

Book 11

Rainbow Days, Vol. 11

by Minami Mizuno

Published 12 September 2024
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

It’s Keiichi’s time to shine on Sports Day! But when he sees Nozomi enjoying volleyball practice, he can’t understand why he feels strangely unsettled. Meanwhile, Mari has a big confession to make!

Book 12

Rainbow Days, Vol. 12

by Minami Mizuno

Published 7 November 2024
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Mari has told Anna that she’s in love with her. Will their friendship now change, and where does that leave Natsuki and Mattsun in their unrequited loves?

Book 13

Rainbow Days, Vol. 13

by Minami Mizuno

Published 16 January 2025
Four male friends support each other through the colorful ups and downs of teenage love.

These four friends couldn’t be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

It’s now or never for Natsuki! Will he manage to tell Anna how he feels about her before the school festival is over? And how will she react?