Book 1

An isekai fantasy about becoming a legendary guardian!

At 34 years old, Kubo Tamotsu works at an exploitative company only to wake up one day in an unfamiliar world, reincarnated into the body of a six-year-old. Not aware of his innate “Barrier Master” skills, he finds himself on the slave market, and up for auction! When no one bids on him and he’s queued for disposal, he is rescued in the nick of time by Marquess Basam. He will be raised as the Marquess' personal Barrier Master under a new name, “Linus,” and his talent as a Barrier Master will grow day by day. His troubles never seem to end, as he struggles to survive!

Book 2

AN ACOLYTE OF CHIVALRY AND SECURITY

It was an ordinary day when Linus found himself reincarnated in another world and blessed with the power to become a Barrier Master. Through years of dedicated training, he quickly developed his skills. But just as he was poised to become a Barrier Master of the royal family, Juka Palace is attacked by an unknown foe. Linus rushes to their rescue with Eryl, hoping he’s developed his skills well enough to save everyone!

Book 3

Barrier Masters: wielders of a rare and powerful guardian magic, entrusted with the lives of those under their protection. When his life on Earth ends, Lynos is fortunate to be reborn and to inherit this special gift. What’s less fortunate is that he’s been reborn as a child, and slated for sale as a slave. Narrowly avoiding a dire fate, he is taken as a servant by a prosperous noble family, where he is trained to become the guardian of its reigning members. Step by step, one trial after another, Lynos prepares for a life of adventure as a Barrier Master!

Book 4

The household of the Basam Marquess, who raised him as a Barrier Master named Linus, gets caught up in the Royal Army’s rebellion and falls. Desperately overcoming his grief, Linus begins a new life in the neighbouring Hideta Empire. One day, while resolving trouble concerning the First Princess and helping a pretty demon girl, he meets a beautiful part-human, part-sheep woman in the slave market...

Series Overview: At 34 years old, Kubo Tamotsu works at an exploitative company only to wake up one day in an unfamiliar world, reincarnated into the body of a six-year-old. Not aware of his innate “Barrier Master” skills, he finds himself on the slave market, and up for auction! When no one bids on him and he’s queued for disposal, he is rescued in the nick of time by Marquess Basam. He will be raised as the Marquess' personal Barrier Master under a new name, “Linus,” and his talent as a Barrier Master will grow day by day. His troubles never seem to end, as he struggles to survive!

Book 5

Suddenly reincarnated in another world as a slave, Linus became an excellent Barrier Master. In the Hideta Empire where he has started a new life, his days are busy alongside the demon girl Peris and the beast-woman Meirius, who he rescued from a slave auction. However, a horrible conspiracy at the castle involving the First Princess Ricolette has begun to move. Before long, its effects reach Linus?!

Book 7

An isekai fantasy about becoming a legendary guardian!

At 34 years old, Kubo Tamotsu works at an exploitative company only to wake up one day in an unfamiliar world, reincarnated into the body of a six-year-old. Not aware of his innate “Barrier Master” skills, he finds himself on the slave market, and up for auction! When no one bids on him and he’s queued for disposal, he is rescued in the nick of time by Marquess Basam. He will be raised as the Marquess’ personal Barrier Master under a new name, “Linus,” and his talent as a Barrier Master will grow day by day. His troubles never seem to end, as he struggles to survive!