Mahoroba Days

From Hoshikuzuu Scans:

The Kuga House is the most prestigious deer family in Nara Prefecture. Shiraha, their heir, is attached to childhood human friend, Sousuke. Shiraha is popular and loved by all, while Sousuke is a mere servant of the house. But he is always telling Sousuke how much he likes him. Even though he feels special to be singled out by the beautiful and esteemed Shiraha, he knows that there is a line that he cannot cross. But! During mating season, Shiraha can’t control himself anymore and he comes on to Sousuke! Since then, the scales of their well-balanced relationship tips and Sousuke’s virtue falls into danger!