Manami, a girl who ended her far too short life in a lonely hospital room, reincarnates into the world of an online game she was obsessed with in her past life—as the very Tamer character she had raised. Having obtained a healthy body, which was impossible in her previous life, along with her powers as a Tamer, Manami's goal in this new life is to reunite with her "family"—the monsters she lovingly raised in the game. However, the monsters she is looking for are all absurd, world-defying S-rank monsters...?! A fantasy journey in another world spun by a once-lonely girl and her strongest monsters.