Adult role-play. When Yu's father remarries, Yu enrolls at a boarding school. His school years pass in a flash, and on graduation day his beloved stepmother Kanna runs to greet him with a smile. Overjoyed by her visit, the now-adult Yu celebrates alone with her that night. They talk until morning and finally confess their mutual feelings. “A gift for Yu, now that you're an adult,” Kanna whispers before kissing him gently, helping him take one more step into adulthood...