C1 and C2 are best friends. Yet C2 has a secret that C1 doesn’t know about. C2 is one of the most dangerous giants in the universe and is hunted by scientists. One day, C1 walks into the forest where C2 lives and comes across C2’s home. C1 finds out the secret, but she/he keeps their mouth shut. C2 finds out C1 saw them, and makes C1 promise not to tell. (Romance can be added if you want.)
C1 is walking down an alley and finds C2. C2 is the leader of the biggest gang in town. C2 is in really bad condition, so C1 takes him/her in. C1 finds out who C2 is once C2 wakes up. They grow close and eventually end up falling for each other.