At the end of the year, I returned to my parents' home in Niigata. Therefore, I met my cousin Tsubasa-neechan for the first time in 10 years. After a long reunion, the sweet memories of those days were revived. She was my first love partner and my first kiss partner. 'Hajime-chan… I have become a married woman.' But she has a husband… And my wife… First love or even marriage. You should never make a mistake. I will spend three nights with her under the same roof...