Koi Nante Dekikkonai
From the Animeraider:
Tsubomi learns that a rumor has spread through her school that Haruyama likes her, which seems improbable as heâ€™s handsome and sheâ€™s not very pretty (according to the gossip). She has a stern look, glasses and hasnâ€™t many friends. When Haruyama actually asks her out she believes itâ€™s all part of a cruel joke and calls his bluff and then dumps him almost immediately, just so he can see what itâ€™s like to be treated so cruelly.
Only Haruyama might have been telling the truthâ€¦
Pass (if needed): toshokan