I Thought It Was a Stray Cat, But It Was a Tiger Cub

Ajin saw a cat beastkin abandoned by their parents at an amusement park, just like his past, and took them in. But it turned out the child was a tiger beastkin, and Ajin was embarrassed but tried to find the child's parents. Before they knew it, they thought they had become a family filling each other's emptiness, but at Hyunho's high school graduation ceremony, Ajin receives a confession from Hyunho. "You said you'd be my partner when I became an adult." "...Huh? Partner?" "Hyung... I like you." "......" "Please be my mate." When he was young, he seemed to think of the meaning of family as a partner, so he promised to become his partner when he grew up. He thought that when Hyunho grew up...