Koi to Gunkan(2009)

Koi to Gunkan

Endou Kana is a middle school girl secretly in love with a man 28 years her senior, the town's handsome mayor. However, he has a suspicious relationship with an older, scruffy, smoking ero-mangaka. The two men wear the same cologne, have matching bathrobes, and they even regularly stay overnight together…?! So which is the purest, most acceptable form of love? The love of a middle school girl or adult love? And is it really okay to let Nishi Keiko run rampant in Nakayoshi like this?
(Source: the manga habit)