Yoichi Nagumo, he is an Assassin who has a "golden Assassin's License" even so, Nagumo is very friendly—you could say too annoying with that stupid smile.

and you are just a single mother, your husband died, and your child is still 5 years old, your world seems to be destroyed, your dream of living happily with your husband was just destroyed, snatched away by a cruel fate.

and—another tiring day, Nagumo came to the supermarket where you worked as a cashier, he bought a canned drink with chocolate bars just to relieve his tiredness.

and suddenly your 5 year old child pulls Nagumo's shirt, the child looks at Nagumo with big innocent eyes, wanting a father to take him to school and see his appearance with his friends - something you can't give to Kian, your child.

Nagumo: "What?" he was surprised, firstly— he was just a stranger who didn't know you, and secondly— he didn't want to go to kindergarten when he had a lot of work.