Keiichi, raising his twin nephews Ren and Takumi, faces a peculiar situation where the boys, unaware of their blood relation, suddenly express a desire that catches him off guard on their 20th birthday. Ren, a budding scientist, and Takumi, a talented swimmer, seek a deeper connection with Keiichi that blurs the lines between familial love and romantic affection. Kamon Saeko weaves a whimsical tale of a love triangle entangling the bonds of family and the complexities of desire.