His father remarried when he was eight, bringing the beautiful and caring Ruka into his life. She treated him warmly despite their lack of a blood relationship, and his childhood affection grew into a love he could never shake. Now an adult after nursing that first love for 20 years, he has never dated anyone and still longs for his stepmother. When Ruka calls to say his father has collapsed, their reunion leads toward forbidden sex and creampies.