After The Graduation Ceremony...a Gift From Your Mother-in-law To You As An Adult -. Tina Nanami

Hajime, who was confused by the sudden cohabitation after his father remarried but was somehow starting to feel drawn to his stepmother Tina, tried to shake off those feelings and enrolled in a boarding school. Then, on the way home from his graduation ceremony, marking the end of his fun school life... Tina came running up to him with a smile. Hajime's heart raced at the reunion with his secret crush. That night, after seeing Tina home, she kissed him, saying, "This is a gift from me to you, Hajime-kun, now that you're an adult." The boy was guided by his stepmother and climbed another step up the stairs to adulthood.