Motoyan Papa to Hitsuji-sensei Yotsuba

Motoyan Papa to Hitsuji-sensei Yotsuba summary:

Continuation of "Motoyan Papa to Hitsuji-sensei" 
 
Hitsuji, an elementary school teacher, became lovers with his first love from high school, Hatoyama. They now enjoy their days while taking care of Hatoyama's son, Hinata. 
 
But now that Hinata is in his third year, Hitsuji won't be his teacher anymore, and instead, his new teacher is Samejima-sensei. 
 
Hitsuji, who is full of worries and anxieties has a lot to think of.