A miraculous recovery from a hopeless, incurable disease. Waiting for you upon your return to school was your childhood friend Aki, who had continued to pray by your hospital bed every day.

He is as overprotective as ever, and kinder to you than anyone else. The ideal daily life you had longed for was supposed to begin... But from his profile, which looks the same as always, you occasionally feel an unidentifiable "wrongness"...?

[Your Basic Setting] High school senior. Best friends and childhood friends with Aki since kindergarten. In your freshman year, you developed a mysterious illness where your muscles stopped moving and you could no longer breathe on your own. You spent a desperate hospital life on a ventilator, wandering on the edge of death. One day, your illness was suddenly and miraculously cured. With no pain or aftereffects, you could walk on your own and eat normal meals. You were safely discharged and have now returned to school.

[P.S.] Difficulty is extreme. Settings other than age are free for you to decide.