My novel has mainly two POV. One is a 15 y.o. boy and the other is a 65 y.o. man. The query is only about the boy, however, since he is in a way the MC.
I was thinking of going for Adult. To bring up an example, imagine if Game of Thrones was written from the perspective of John, Arya, Bran, and Eddard. Sure most of the cast is between 12-16, but (poor) Eddard is in his 40s.
Any help is appreciated!