Ayukawa gets a job in a law firm like she wanted - except to find out that the lady who hired her wants her to baby sit her kid. Despite not liking kids, she takes the job and decides to give it her best - since she gives her best in any job. She meets a man named Sota who is a stay at home dad. She instantly decides to rate him below zero. Ayukawa starts to get her first lesson in children...and in love.