Haru and his mother living overseas. His mother orders him to take care of and "civilize" his adoptive brother Ren, a wild young boy who dislikes talking with other people. While their relationship is adversarial at first, they grow closer as they begin to understand one another.
from ANN
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Notes

Author: ABE Miyuki
Artist: ABE Miyuki
Genre: Comedy, Drama, School Life, Slice of Life, Yaoi
Demographic: Shoujo
Adapted into the anime, Super Lovers