From Nakama:

A tengu with peach colored wings suddenly appears before worrier high school student, Kotetsu! The tengu, Momo, says he's always been watching over Kotetsu in order to repay a favor once received from an ancestor of Kotetsu. How will the start of their strange life together turn out...? The odd tale of Momo the tengu and Kotetsu's fluffy, strange love!