[Nuku with overwhelming 4K video! ] Kominato Yotsuha's first full-scale drama AV! Riho, a female college student who moved to Tokyo from Nagasaki and lives alone for the first time. One morning after getting used to university life, she wakes up to find a stranger (Kenji) next to her! Riho is attracted to Kenji, who has a S-like and pushy attitude. A coming-of-age reality work about a couple climbing the adult stairs.