* CompleteMonster: Saizou Toki and Araki.
* EarWorm: The opening theme
* HoYay / FoeYay:
** Hikaru's obsession with Reiji has hints of this. Reiji even calls him a 'stalker' at times. Reiji adds his own hints to the mix.
** Sumishiba's fixation on Himuro can be interpreted this way.