History HoYay / HighschoolDXD

* Kiba is sometimes this to Issei like the time when he was really grateful to Issei for resolving his dark past, he comments that ''It’s hot around my chest region.'' Issei just finds him disgusting when he's like that, it didn't help Kiba is too serious about it to be passed as teasings or jokes. At least in Issei's head, Kiba doesn't seem like joking at all.
** Kiba and Issei is {{Lampshaded}} by nearly everyone including even the author. It doesn't help that Kiba thus far hasn't shown any interest in anybody yet except his moments with Issei. He starts joining the girls in their activity to score points with Issei, ranging from cookingfood to wearing nurse outfit.
*** [[WordOfGod The author]] eventually out and out calls Kiba a heroine in the afterword of volume 12.
*** In the volume 13 short story "Issei SOS", Kiba decides to use one of Azazel's inventions to reverse his gender and turn himself into a bishoujo just to help Issei get better after he falls sick. He even wears a nurse's outfit. To top it off, he's not used to wearing heels so he accidentally trips and falls on Issei and starts to blush. He starts to confess something to Issei but we never find out what because the girls walk in on them. HilarityEnsues.

** And then in Volume 14, it's shown that [[spoiler: Kiba has refused the invitation from the girls that had invited him to eat with Issei with food ''he personally prepared for the both of them''.]]
** Now we head into the first chapter of volume 18 where ORC are preparing for their devil jobs during Christmas time. Issei correctly guesses that Kiba will get increased requests from older women. Kiba declines, though, and promptly reveals he is planning to bake a cake and wants Issei to eat it. Cue Kiba making, in Issei's words, 'the eyes of a maiden'. Issei quickly evades the encounter by texting Shinra that about it and asks her if she'd like a slice of Kiba's cake.
** Then there's the short story ''The Student Council’s Decision'' where a popular doujinshi is being published with Issei at the top and Kiba at the bottom. When the student council and Issei (long story) find out about it, the entire manga is in its ''fifteenth volume''.
** Story about style of Miyama Zero (Crossover with ''Literature/TheAmbitionOfOdaNobuna''): Upon performing the aforementioned style, Issei and the ORC have swapped places with Nobuna Oda and her retainers. Kiba becomes extra motivated to bring them back after blushing at the possibility of [[ItMakesSenseInContext Issei using a feminization technique]] on him, ''just so he can learn the technique''.

** In the first short story of volume 13, there's a scene where Issei gives him blood from a wound from his finger. He notes how warm it is in Gasper's mouth and how dangerous his thoughts are starting to get. What's more, his subsequent power-up and fight are all for Issei.

---> "I..I should also become a girl to do things with Senpai…."

** There's also the fact that he woke up to his power when he heard that [[spoiler: Issei died.]]

** Xenovia in general tries to include Asia in everything she does with Issei, and goes [[RoaringRampageOfRevenge absolutely nuts]] when Asia is hurt in any way.

* Rias and Akeno get in on it during the onsen scene, where Akeno was apparently doing something extremely arousing to Rias' breasts. To the point Rias told Akeno to stop because she wanted Issei to be the first to do that to her.

* When Koneko was under a spell which Rias put where it was meant for Issei to reverse his personality which made Koneko a pervert and strip both Rias and Asia, and play with their breasts. ''Under the shower no less.''
* There's a one-sided relationship with Issei and Vali.

** Sairaorg has been sending Issei gifts as of volume 14, a behavior most likely influenced by Issei being a [[BloodKnight rival for him]], being good friends and even having resolved his [[DarkandTroubledPast emotional baggage]] when Issei [[spoiler: used Bilingual on Sairaorg's mom and eventually causing her to wake from her coma]].

* Then there's Xenovia and Irina. Especially Volume 14 where [[spoiler: while all the girls were sleeping at Issei's bed, Irina uses Xenovia as a hug-pillow.]] Hell, these two alone could fill up an entire entry but some other early examples include:
** After Xenovia becomes a devil, Irina looked like she and Xenovia had a bad break up.

* Sirzechs and Ajuka have been going at it for quite a long time. Ajuka will only do something if Sirzechs asks him to do it. Despite being equals, Ajuka will ''always'' defer to Sirzechs' judgement no matter what. Threaten Sirzechs and his plans and he will give you one hell of a thrashing.

** Story about style of Miyama Zero (Crossover with ''LightNovel/TheAmbitionOfOdaNobuna''): Upon performing the aforementioned style, Issei and the ORC have swapped places with Nobuna Oda and her retainers. Kiba becomes extra motivated to bring them back after blushing at the possibility of [[ItMakesSenseInContext Issei using a feminization technique]] on him, ''just so he can learn the technique''.

* On the FoeYay side, we have a one-sided relationship with Issei and Vali.
** FoeYay is a recurring theme, much to Issei's chagrin. Not only Vali but Sairaorg [[spoiler:and ''Cao-Cao'' of all people]] have the BloodKnight version of a man-crush on him, seeing him as a worthy target to defeat.
** Not entirely FoeYay but Sairaorg has been sending Issei gifts as of volume 14, a behavior most likely influenced by Issei being a [[BloodKnight rival for him]], being good friends and even having resolved his [[DarkandTroubledPast emotional baggage]] when Issei [[spoiler: used Bilingual on Sairaorg's mom and eventually causing her to wake from her coma]].

** Basically, the pair have a very RomanticTwoGirlFriendship going on, to the point where one wonders if Irina's [[CantHaveSexEver enforced chastity]] is only frustrating Issei.

** Story about style of Miyama Zero (Crossover with ''LightNovel/TheAmbitionOfOdaNobuna''): Upon performing the aforementioned style, Issei and the ORC have swapped places with Nobuna Oda and her retainers. Kiba becomes extra motivated to bring them back after blushing at the possibility of [[ItMakesSenseInContext Issei using a feminization technique]] on him, ''just so he can learn the technique''.

* Serafall is very open about her incestuous desires for her sister. For her part, Sona's embarrassed reactions are entirely regarding Serafall's public clinginess; she shows no revulsion regarding the incestuous attraction.