The eldest and third sons of a six-sibling family have always shared a deep bond since childhood. Over time, however, the younger brother begins developing feelings for his older brother that go beyond mere familial affection. One day, by chance, the two end up alone together on a hot spring trip. Packed with even more eroticism and romance than the previous installment, this cosplaying BL work portrays the deepening bond between brothers and the blossoming of a new, intimate relationship.