Shuu Koibuchi  

, 鯉淵修

Shuu is the half-brother of Kuranosukes and serves as his personal assistant. Although he was traumatized by witnessing his father cheating on his mother at a young age, this has caused him to develop a fear of women. Despite this, when he first laid eyes on Tsukimi in her fancy attire, he began to feel attracted to her. However, whenever she wore her regular clothes, he struggled to recognize her.