Kimi to Issho ni 2

The main character, who belonged to the track and field club, quit the club due to his injured leg.
One day, he suddenly got acquainted with his senior Nagasawa Sayuri, and joined the "love research department" that she created.

At first, it was an awkward atmosphere because he was the only boy in the club, but him and the heroines gradually became aware of the feeling of love...