PillarCake AU based on a suggestion from @ask-darius-brando​:

Iwao: WE HAVE HAD A SUCCESSFUL BONDING EXPERIENCE. AND A COMING OF AGE. BEHOLD MY SON. Akira: That’s nice... Good on you being an... adult, Eiji. ... That’ll wash off pretty easily, right? Iwao: IT WILL NOT. THE MARK IS A RIGHT OF PASSAGE FOR ALL PILLARS. IT IS INDELIBLY MARKED BASED ON LINEAGE. Akira: Wha- wait IS IT A FUCKING TATTOO?! Iwao: HE IS NOW A MAN PER PILLAR TRADITION AS NEAR AS I CAN FIGURE OUT THROUGH HIS HUMAN HALF AGE. Akira:

 HE HAS /SCHOOL/ TOMORROW!