Senpai, how long are you going to treat me as 'just a junior'?

Autumn of second year of high school. The club senior, Asagi Haruomi, is friendly and caring with everyone, but openly insists that 'if I'm going to date someone, it'll be someone older.' He pats my head from up close, yet whenever we get close to the heart of the matter, he draws a line with a smile, saying 'because you're a cute junior.' Where does this unrequited love and this unbreakable wall lead to...?