Tiny bit more on omega Yoshiki and beta Hikaru
Pretty sure I made Yoshiki's mom and sister an alpha and his dad a beta
I actually did think this through bc in my mind its traditional for omegas to have betas help them through heats as in they bring them food and water and keep them company since betas don't have a scent and omegas are more likely to accept a beta into their nest rather than an alpha or another omega
Usually there is already a beta in the family of an omega since omegas are rare and it is unlikely for 2 to be born in the same family so there wouldn't be a problem of alpha and omega parents (since that is the traditional omega pairing) not having a beta available to help
The most common pairings are actually alpha/beta and beta/beta so when an omega child is born their parent will be the one to look after them and occasionally siblings step in too
But the thing with Yoshiki is that his relationship with his father is so strained his omega refuses to let him in the nest regardless of scent and since he's the only beta in the family Yoshiki would have to then manage on his own, exept hikaru is a beta, one Yoshiki is more than happy to allow into his nest
So Hikaru takes on the responsibility of caring for Yoshiki every 6 months when his heat hits. Its not like it's hard work since Yoshiki's family provides the food and supplies, all hikaru has to do is bring it up to the room. For the most part its just the two of them lazing about in Yoshiki's room watching movies and reading comics with hikaru occasionally needing to replace Yoshiki's cooling pad on his forehead and sometimes stepping aside while Yoshiki goes into a nesting frenzy and rearranges the room
Other than that it's pretty much just hanging out so hikaru was more than glad to help, especially since being the official "caretaker", or whatever the word would be, for Yoshiki meant he was exempt from school during these times. (Side note i imagine this would require a lot of paper work and even doctors notes being like yeah the relationship with the only beta family member is fucked so hikaru stepping in is the best for Yoshiki's health and I just think that's funny)
And well then Hikaru died and that really messed with Yoshiki AND his omega especially with having to come to terms with the fact that his body is here but he isn't and his instincts are just going crazy during his next heat
Instinctively he wants Hikaru there but he also doesn't want to be around 'Hikaru' when he's at his most vulnerable. Not that it matters much since Hikaru is already registered as his caretaker and has been for a few years now so Hikaru is going to be there unless he wants people to start asking questions
Yoshiki is fighting his instincts to relax when hes in his nest that he begrudgingly built since he felt uncomfortable not having one even though he tried his best to ignore it so as to not show vulnerability in front of hikaru
And all that fighting is exhausting, so eventually he drops like a rock and his instincts completely take over. He's been in so much distress about Hikaru and the thought of losing him that he can't help but cling to him now that his rational mind isn't stopping him.
He wraps himself around Hikaru and purrs happily when he returns the affection and whines like a pup everytime he pulls away even if it's for something like getting food.
By the end of his heat Yoshiki is mortified at his behavior, and he's even more mortified that since that incident his instincts register Hikaru as safe because he took care of Yoshiki when he needed him most