BF-519 Completely subjective, my sister-in-law is Yui Hatano.

Film Introduction

I used my summer vacation to visit my brother and his wife in Tokyo from the countryside. It had been a while since I last saw my sister-in-law, Yui. She is bright, kind, and incredibly beautiful—almost too good for my brother. But then my brother suddenly went on a business trip, leaving me alone with Yui…