[Chinese]SDAM-144 A bath with my little brother after 10 years. "How about taking a bath with your little brother?" Yuna, 22-year-old college student, literature department.

"I never thought anything of it when we used to bathe together..." Yuna, a fourth-year university student harboring secret feelings for her younger brother, had been using his underwear as material. One day, she was pushed into taking a bath with him for the first time in ten years. What will become of their relationship after crossing that final line? The serious and proud big sister arrived at the most taboo form of love.