Kanojo ni Shitai Joshi Ichii, no Tonari de Mitsuketa Amari-chan  

I Found Amari-chan Next to the Number One Girl I Wanted to Make My Girlfriend, 彼女にしたい女子一位、の隣で見つけたあまりちゃん

Fukusuke is a kind-hearted individual who is drawn towards Yua, the most beautiful girl in class. However, there are rumors that Yua is dating Yuusei, Fukusuke's best friend and a basketball star. Despite this, Fukusuke remains resigned to his unrequited love as he watches from the sidelines. That is until he meets Amari, another cute girl who is overshadowed by Yua. Both Amari and Fukusuke find themselves in similar situations and decide to practice "acting normal" together by becoming friends.