Henjo: Hen na Joshikousei Amaguri Senko, Kaette Kudasai! Akutsu-san Recommendations
They both involve a girl who isn't originally in love with the MC but eventually fall in love with the other. Also not as many romcom cliches in either and they're both ecchi.
This is what is called the love story, both have a strange love affair. They have the same beginning and similar storyline, only Akutsu is a love story about an adult girl while Henjo is an adult. But this can still be a recommendation.