The Price of Pleasure - S1.E4

Ryuuken held her promise and "protects" Kanako. She always stays beside her and attends classes together with her, although she is a class above Kanako. She even stays overnight at Kanako's room. But Ryuuken's protection causes Kanako more pain than ease. A classmate of Kanako (Kiri) notices it and to help her, she tells Kanako that they are going out.