I was in despair about my life as a 4th-year college student, but on the day of my graduation ceremony, a voluptuous, perverted older sister.

SONE-424 Yuzuru feels depressed because he didn’t get laid during his university years and decided to skip his graduation ceremony. He was wandering around town alone when he bumped into Unpai, a local classy slut, who saved the day for him.