One Man's Son 2018 (Japan), also known as Hitori no Musuko is Japan drama premiere on Jul 7, 2018
Ituski Yamauchi receives a phone call informing him that his father has collapsed. Ituski Yamauchi doesn't have a great relationship with his father, but his father is still important to him. Meanwhile, Ayumu Kurata works for a moving company, he does not have a father.
Ituski Yamauchi and Ayumu Kurata, who have completely different backgrounds, connect through one piece of document.