KoiKimo: It's Disgusting to Call This Love

is a Japanese web manga series written and illustrated by Mogusu. The series ran on pixiv Comic's web manga site Comic POOL from February 2, 2016 to March 25, 2021 and resulted in 8 tankōbon volumes. An anime adaptation by Nomad aired from Apr 5, 2021 to Jun 14, 2021 and ran for 12 episodes.

Plot
Once you fall for someone, you can't stop the love. A strange encounter spurs the meeting of Amakusa Ryō, a high spec businessman who's loose with women, and his high school sister's best friend, Arima Ichika. From there he falls madly in love. On the one hand, he approaches her with almost too straight-forward methods, while she responds simply disgusted, insulting him without hesitation... and he takes it as her way of showing love.