headboob
A fairly common trope in anime pictures involving a shorter character standing underneath a taller (and more endowed) character, with the head of the shorter pushing into the cleavage of the taller from beneath.
Also applies to any angle, so long as the breasts are being rested on the head of another character.
This tag does not include the face-between-breasts position.
This tag has been aliased to breasts_on_head (learn more).