If you're looking for manga similar to Osananajimi ga Zettai ni Makenai Love Comedy (Light Novel), you might like these titles.
As an overweight child, Makabe Masamune was mercilessly teased and bullied by one particular girl, Adagaki Aki. Determined to one day exact his revenge upon her, Makabe begins a rigorous regimen of self-improvement and personal transformation. Years later, Masamune re-emerges as a new man. Handsome, popular, with perfect grades and good at sports, Masamune-kun transfers to Aki's school, and is unrecognizable to her. Now, Masamune-kun is ready to confront the girl who bullied him so many years ago and humiliate her at last. But will revenge be as sweet as he thought?
Wataru Sajou, deeply infatuated with his beautiful classmate Aika Natsukawa, approaches her with unwavering determination, fueled by dreams of their shared love. However, one day he wakes up questioning his worthiness of being with someone as wonderful as her. Fearing he's not good enough, Wataru begins to create distance, leaving Aika puzzled. She starts to believe he now despises her....
The childhood friends Akkun and Nontan are boyfriend and girlfriend. But Akkun is always saying ridiculously harsh things to Nontan as well as being cold with her and is frequently moody. But that’s just how Akkun expresses his love for Nontan. This is a high school love comedy about Akkun and Nontan, who doesn’t seem to care at all about how Akkun acts toward her.
Haru Tsuwabuki must successfully confess his love to one of 420 girls, or he will die (in more ways than one). However, as soon as he enrolls, he is derisively labeled a lowly "parasitic biting insect," and his adolescence descends into darkness. One day, Haru meets Miyako Dokuutsugi, a beautiful girl with the worst misfortune at the academy. Haru's life descends from darkness even lower into hell.
Ryoko Masaki is a serious class president, yet she has decided to become a delinquent to catch the attention of her childhood friend, Masato Todoroki. The reason is that as a discipline committee president, Masato always goes out of his way to remind delinquents of their attires, yet he doesn't pay any mind to the serious Ryoko. That's why Ryoko decided to dye her hair and shorten her skirt, and when Masato saw her, he was devasted and concerned. Is this what Ryoko had hoped for...?
Kurumi lives under one roof with her father and her overprotective brother, Ataka. One day, she reunites with Nagio, her childhood friend. Now a young man, Nagio doesn’t hesitate making advances—much to Kurumi’s dismay—kissing her out of nowhere and telling her how he has always liked her, in the process totally wrapping her around his finger. And while Kurumi is put off at first, she eventually finds herself head-over-heels for Nagio…
Spring. The "season of love" has arrived and it seems that finding himself a girlfriend was harder than Jun’ichi believed. To break the status quo, Jun’ichi’s friends have forced him into confessing to the gyaru, Yame Yukana. However, things do not go quite as he expected. His series of "firsts" begins!
Follows a boy named Jun who is childhood friends with two twin girls with different personalities. He ends up in a love triangle with Rumi, who looks boyish but is an maiden on the inside, and her twin sister Naori, who is a cute otaku.
Takeo Gouda is a giant guy with a giant heart. Too bad the girls don't want him (they want his good-looking best friend, Sunakawa)! Used to being on the sidelines, Takeo simply stands tall and accepts his fate. But one day when he saves a girl named Yamato from a harasser on the train, his (love!) life suddenly takes an incredible turn!