Yuriri or Yunari Kannagi is the twin sister of our hero. A tall, slender girl with beautiful long light hair. Yuriri is very cold and arrogant in relationships, and Yumma is no exception.


Ichika Suzumori is a classmate of the protagonist. A pleasant-looking, bright and clumsy girl with a short haircut. With a modest height of 150 cm and weight of 40 kg, she has quite impressive curves...


Miko Gotemba is another classmate of Yumma-kun. A dark-haired girl with long hair down to her knees. She is the type of girl obsessed with something specific. 


Other characters - Saki Todo (nurse), Reijiro Kannagi (hero's father), Inamori Haru (owner of a hot spring inn), Reje (mysterious girl at the inn).