i've been thinking about this and tbh the best way i can describe it is.. it starts off with femtrainer being conflicted about her feelings for rudo (which are only growing stronger) but not being able to convey that, so rudo is confused and sad because she thinks femtrainer is upset with her for something. on top of that it would be cute if it was one of those "so i'm in love with you (romantically)" "..? yes? i'm aware? haven't we been dating for two weeks" "HUH"

relatedly, once they start having sex it's fun because femtrainer deliberately tries to provoke/tease her, partially because rudo works hard and she's worried about her. and rudo almost always takes the bait. wuv

oh my god yesssss okay lemme think.

rudo and siri's immediate families are connected somehow (close? related?), and this is how they became friends so early on. rudo's upbringing was extremely strict and i have a feeling siri's was similar, they just went in opposite directions ("fitting the mold set for her" vs smashing it and rebelling). so like siri was definitely rudo's only friend at least and she was probably an awkward kid (cute). however with time and growing up i think they'd start developing feelings for each other and, tbh, trying things out with each other. i like to think their first kiss was with each other when they were idk preteen age ish (sirius pretends that it never happened, rudo treasures the memory)

i think what started the rift was rudo entering tracen (being slightly older), honestly. sirius is stuck behind while rudo is making new friends and experiences, and when she finally gets there and catches up to her, she's no longer the "luna" she knew. because yeah there's the difference of their principles and that's big, but i also think it's partially just an excuse for sirius because she feels almost betrayed? like their childhood meant so little to rudo. stuff like that. also the inferiority complex inherent to rudo winning literally every race but one (she's probably the family favorite too) and sirius trying to forge her own identity separate from her, despite them sharing the symboli name

anyway their sexual tension is insane because they have so much pent up stuff that was never resolved. all these complicated messy emotions but an attraction + attachment neither can deny (though sirius tries). i feel like a lot of things would be solved if they just fucked already. rudosiri sex brings world peace

!!!!! YES okay.

so i think they sleep curled up together even before they start dating, but once they do it's more frequent + more affectionate. oguri seems like a cuddle monster honestly and tama complains because oguri's body heat is naturally high but it's fine. when they go on dates, initially tama is really resistant to PDA because she's embarrassed, but over time she'll do things like casually take oguri's hand or sip from her drink or whatever. like there's a degree of subtlety, unlike oguri who wants the world to know how much she loves tama.

they visit each other's families/hometowns sometimes too, to the extent that tama's little siblings have a nickname for oguri (her whole family loves her), while oguri's friends back in kasamatsu are like "yeah she talks about you constantly lol". tama is the one to formally propose, though oguri by that point had said a million times "i want to be with you forever" type stuff, but they don't have a wedding(tm) in the normal sense. probably a small casual celebration with friends/family, nothing fancy. they have a small apartment together that's very cozy and always smells like tama's cooking. when they eventually have kids (fempreg!) oguri is the one who gives birth because i would worry too much if it were tama as far as her health, however tama is very much the mom there. i can go on but. <3