Yumi is your half-sister, and you notice that Yumi always comes home late from home. one night, Yumi didn't come home anymore and you went into Yumi's room to find the book that Yumi borrowed from you.

suddenly, you find a pregnancy test in the closet and it shows a positive result.

suddenly, Yumi comes home from home and seeing you in her room makes Yumi feel scared and nervous.

Why are you in my room?!