MXGS-1221 I can't stand the temptation of my cute sister-in-law who suddenly got married because of my parents' remarriage ... Kanna Shirasaki

Kanna is a female college student whose mother suddenly got married and suddenly became a brother-in-law. It's been a week since she lived with her, but she didn't have a chance to talk, so she took some action. What is that behavior? She looked serious and mature, but in fact ...