As the eldest son of the Kadokura family, Kouhei's main concerns revolve around his mischievous younger twin brothers, Aoya and Shion. Constantly outshone in matters of the heart by his siblings, the inexperienced Kouhei finds himself in an arranged meeting. However, when the twins declare, 'Our true desire is you, big brother,' they take charge and guide Kouhei on a journey of self-discovery and pleasure! This tale also includes a bonus one-shot: Kamakare.