Aquarium's Serenade

Noda is a salaryman who is good at his job but has trouble socializing outside of work, and Arikari is a girl with a temper who falls for him. Then there is Ueshima, Noda's former classmate, whom Noda has a faint crush on. The story revolving around these three people will make you nod your head so hard that it might just fall off! (Source: Flower Comics, translated)