Eri, a college student living in Ikebukuro who can't resist a little pressure. On her way home from a tennis club drinking party, slightly tipsy and in high spirits, the conversation quickly escalates and she immediately agrees to a sudden invitation. She sincerely accepts the offered cock, even swallowing the prematurely ejaculated sperm with a smile. Despite initially just supporting a virgin guy, she ends up taking the lead herself, creating an exhilarating and thrilling experience that leaves hearts racing.