Tween boy lover
From BoyWiki
A tween boy lover, or TwBL, is a boylover who is primarily attracted to boys between middle childhood and adolescence. These are boys aged between about 8 and 12 years old. Though this is arguably the most common stated age of attraction among self-identifying BLs, the term does not have the same currency or widespread usage as the related terms TBL or LBL. It is most often used to distinguish this AoA range from the others.