Shimotsuki-san wa Mobu ga Suki ~Hitomishiri na Kanojo wa Ore ni Dake Dere Amai~ - Vol. 1 Ch. 1.5 - Serialization Celebration

[MangaDex]

 

[GrumpyGizmo]

Yeah this web novel is a banger. They usually follow a template, but this one is very original because the female lead has a unique condition that will surely surprise you. Also the MC is a good person without being an idiot.