While recuperating from a war injury, Kim Seo-yoon accidentally rescues a young wolf beastman (shapeshifter) in the mountains.
Seo-yoon names him 'Yeon-ho' and takes him in as his son.
Yeon-ho, who used to distrust humans, begins to open his heart little by little under Seo-yoon's care, and before long, he starts to look up to Seo-yoon as something more than just a father and a teacher.
Then one day, Seo-yoon accidentally catches Yeon-ho masturbating...
"Can't you come inside and watch? This part keeps getting hard..."
_Source: [Bomtoon](https://bomtoon.com/detail/wolfday), translated_