Osananajimi Kanojo no Morahara ga Hidoi n de Zetsuen Sengen Shite Yatta: Jibun Rashiku Ikiru Koto ni Shitara, Naze ka Tonari no Seki no Kakure Bishoujo kara Kokuhaku Sareta

I, Soma Ichinose, a high school boy, is continuously harassed by my former childhood friend and current girlfriend, Hanabi Kisaragi. I finally reach my limit and decide to break up with her. I won't be tormented by that devilish girlfriend anymore, and I'll live my life the way I want to, for the better. Now that I'm no longer under Hanabi's spell, I can begin to enjoy my school life to the fullest. Yes, it's not too late. The girl sitting next to me, Fumi Yukiyo, wears large glasses give her a strong impression of being stand-offish from the other students. But in the course of conversation with her, I noticed that her personality is the complete opposite of Hanabi's, and I find myself falling for her...?

(Source: Dash X Bunko, translated)