Hifumi Yamada is one of the teens trapped inside Hope’s Peak Academy and forced to play the Killing Game. In School Mode, during Hifumi’s ending dialogue, Hifumi references yaoi when Makoto takes Hifumi’s comment about “holding onto him” as weird (found here).
LGBTQ References in this series:
Danganronpa Another Episode: Ultra Despair Girls (2014): Tokomaru Ship
Danganronpa V3: Killing Harmony (2017): K1-B0, Kaede Akamatsu, Kokichi Oma, Korekiyo Shinguji’s Love Suite Event, Love Across the Universe: Dangan Salmon Team, Miu Iruma, Rantaro Amami, Tenko Chabashira
See also QRM’s entry for this game series.