Happy Rebirthday (1)

Summary
Bossun and his gang are working at the maid cafe for the school festival event. Akane, Rumi, and Shinzo's father has come to visit them. Afterwards, Bossun meets the doctor who helped delivered him on the day of his birth. He starts explaining to Bossun about how, despite being adopted, he does has a blood relative...a twin brother...