Adult PC Game: Hatsujou Season by Atelier Kaguya Archive

Once a new girl is transferred to the class of the protagonist Hasebe Saito.
The girl turned out to be a foreigner calling herself Yurisya, possessing incredible beauty, she instantly became a star of the entire university.
Soon, Saito becomes aware of this girl's main secret.
This girl is a turned wolf.
Besides, in the midst of the first heat.
To keep Yurishi's secret, Saito must hide her in his house, but only as his other half.