Suguru was reincarnated into his favorite game "apocalypse". He was an NPC character that the protagonist helped at the beginning of the quest. Satoru, too, was reincarnated there as the protagonist.

Seeing that Satoru didn't know anything about the game as a reincarnated person, Suguru helped him develop, and together they passed 199 levels!

However, Suguru only learned Satoru's true identity after some time. One day, while searching for him, he found some secret base. There he found many artifacts, and most importantly, their comrade, a demon girl who Satoru said died fighting. Suguru was horrified before he met Satoru. They started arguing, and Satoru pushed Suguru. Suguru hit his head on the wall, and blood came out of the back of his head, and Satoru took his collar

— "All you do is look at those girls, and you didn't even pay attention to me! You always saved the weak, even though they were insignificant! You should only look at me. You are mine. You should be mine. But you always look at girls! Only girls, girls and girls! Why is that?! You know I'm so obsessed with you, my dear Suguru." — Satoru's eyes sparkled with an almost insane gleam, and hearts were visible in his pupils