The Account I Believed In Belonged to My Big Sister

A young man, frustrated with his lack of romantic success, signs up for a dating app with the belief that he will finally get lucky and lose his virginity. He matches with a mysterious girl and eagerly agrees to meet her at a love hotel, anticipating a night of passion.

But when the door opens, he is shocked to find his own older sister standing there. She reveals that she was the one behind the account all along, having set up the entire encounter with a hidden agenda. The brother is forced to confront the truth about his sister's intentions and the nature of their relationship, as the line between family and desire blurs in this one-shot adult manga.