Atsumori-kun no Oyomesan (←Mitei)

Atsumori-kun no Oyomesan (←Mitei) manga summary: One day middle school student Nishiki, who lives in the countryside, meets high school student Atsumori, who came to visit from Tokyo. When talking with the cool Atsumori, she starts noticing her desire to leave the countryside for Tokyo. But the way to Tokyo is unexpectedly through a marriage proposal?!?