Book 1

Trillion Game, Vol. 1

by Riichiro Inagaki

Published 24 October 2024
A charming sweet-talker and a timid computer programmer team up with hopes of making a trillion dollars and getting everything they’ve ever wanted in this world!

Self-proclaimed “world’s greediest man” Haru and timid computer whiz Gaku set out to make a trillion dollars. They start the company Trillion Game to accomplish this task and hope to iron out the details as they go. With charm, technical skills, and no business plan, can these unlikely friends reach their lofty goal?

After Haru and Gaku become the first Japanese people in the 21st century to be listed among the world’s top-ten billionaires, Gaku reflects on when he and Haru met and the events that led to the founding of their company. What started as a middle school acquaintanceship builds to a fruitful and unorthodox partnership as the two progress on their ruthless path to success.

Book 2

Trillion Game, Vol. 2

by Riichiro Inagaki

Published 2 January 2025
A charming sweet talker and a timid computer programmer team up with hopes of making a trillion dollars and getting everything they've ever wanted in this world!

Self-proclaimed “world’s greediest man” Haru and timid computer whiz Gaku set out to make a trillion dollars. They start the company Trillion Game to accomplish this task and hope to iron out the details as they go. With charm, technical skills, and no business plan, can these unlikely friends reach their lofty goal?

Hoping to get their money-making efforts off the ground, Haru and Gaku enter a hacking competition sponsored by Dragon Bank. Competing against elite teams of professionals, the two implement a risky strategy that could lead to a life-changing payoff if it succeeds!

Book 3

Trillion Game, Vol. 3

by Riichiro Inagaki

Published 13 March 2025
A charming sweet talker and a timid computer programmer team up with hopes of making a trillion dollars and getting everything they've ever wanted in this world!

Self-proclaimed “world’s greediest man” Haru and timid computer whiz Gaku set out to make a trillion dollars. They start the company Trillion Game to accomplish this task and hope to iron out the details as they go. With charm, technical skills, and no business plan, can these unlikely friends reach their lofty goal?

In order to sell their (not so) AI-powered flower-vending business, Haru and Gaku must first conquer the nightlife neighborhood of Kabukicho, where there is a huge market for fancy flower arrangements. After pulling off their scheme and making the sale, the next frontier for their business is…mobile gaming?!

Book 4

A charming sweet talker and a timid computer programmer team up with hopes of making a trillion dollars and getting everything they've ever wanted in this world!

Self-proclaimed “world’s greediest man” Haru and timid computer whiz Gaku set out to make a trillion dollars. They start the company Trillion Game to accomplish this task and hope to iron out the details as they go. With charm, technical skills, and no business plan, can these unlikely friends reach their lofty goal?

Filled with reckless abandon when he learns that their mobile game plan was just a bluff, Gaku settles on an even bolder strategy—hacking into Dragon Bank’s servers and stealing their future game plans! His seeming success turns into a high-stakes cat-and-mouse game when Kirihime invites him out on a theme park date.