He first appeared in chapter 79. The prince's parents, the king and queen of Grimel (a fictional European country), invites Sunako to their country, who brings the four guys along with her. There, it was discovered that the king and queen hoped to marry their son, the prince, to Sunako. The prince shares a love of horror and darkness with Sunako, and falls in love with her. Sunako was enchanted with the purportedly haunted forests and crypts of Grimel and unknowingly accepted the proposal. However, on the day of the wedding, Kyohei took Sunako away as he was sick of European food and wanted to eat Japanese food. Sunako has since not reinstated the proposal, but the prince has continued to pursue Sunako, studying Japanese horror stories such as the famous Yotsuya Kaidan.