In Apartment 501 Lives a Sex Hero

In a situation where he is in trouble, apartment superintendent Mana is saved by a mysterious guy living in apartment 501. The guy has an enigmatic appearance and personality, but his actions are undeniable. As they get closer, Mana finds himself drawn to the mysterious hero, who seems to have an air of secrecy surrounding him. As their relationship deepens, Mana is left with more questions about the truth behind the hero's intentions and his own feelings for him.