It’s Virtually Impossible To Make This Boy Like Me
Complete | Kanan,Fuduki roa | 2000 released
The story was cute but then the author went off with the ending. They probably wanted to finish it quickly so they went with the easiest ending... But also the weirdest (aka making her date her step brother).
The Result of Being Reincarnated is Having a Master-Servant Relationship with the Yandere Love Interest