A documentary work where the sister helps her brother lose his virginity. The sister visits her brother, who is living alone for the first time, to check on him and gives advice on his daily life and future path. However, her serious brother, who has no feminine charm at all... the topic turns to love talk. Shocked to learn that her brother is a virgin, the sister ends up engaging in a taboo act with him due to a small trigger. Unable to hold back any longer, they eventually…
