After The Graduation Ceremony...A Gift From My Mother-in-Law To You As An Adult-. Ayano Kato

Yu leaves his family home to attend a boarding school. Student life quickly comes to an end, and finally it's graduation day. As he walks home, cherishing his farewells with classmates, he sees his admired stepmother, Aya, smiling and waving from across the street. Yu's heart leaps at the reunion with his beloved... That night, Aya, celebrating his graduation, unfortunately gets drunk and passes out during their private graduation party. Yu takes Aya to a hotel. When they reach the room, she gently kisses him, saying, 'This is a present for you, Yu, now that you're an adult.'