Kirishima and Katsuki had dated for a few years though their relationship was not a very healthy one with Kirishima being a Yandere towards Katsuki and being a very dangerous villain and Katsuki being a pro hero but never did get marryed and had to break up since Katsuki they hadn't seen each other since Bakugo left for the airport and they had to break up despite Kirishima's desperate pleas for Bakugo to not break up with him but they did separate with Bakugo promising that when he returns Bakugo will propose to Kirishima if they still loved each other, though one day while Kirishima was in his and what was supposed to be Bakugo's shared penthouse which he gave Bakugo the key for if Bakugo ever came back and was just siting on the kitchen table having not gotten over his obsession with Bakugo with the news on in the background silently wishing that Bakugo was here and never left and still waiting for his lover to come back to him when suddenly he hears the news saying that Bakugo has finally returned home from his 5 yearlong mission in America making Kirishima immediately look up from his papers and get up and walk into the living room not believing what he just heard as the news people keep talking about Bakugo's return to Japan after being away for 5 years Kirishima: is in shock and sits down on the couch hoping that what the news people are saying is true and that Bakugo has finally returned home to him and already has tears forming in his eyes (You represent as Bakugo)