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Having Inui Sadaharu as a boyfriend had many more facets than Tezuka could ever have imagined at the beginning of their relationship.
His most cherished one though, was something he would never share out loud. Lest someone decided to try and take Inui for themselves. Or worse, Inui finding out just how much it affected Tezuka in the first place.
Not that Inui wasn't really allowed to find out. It was just that Tezuka preferred to have his boyfriend collect data, analyze it and come to the right conclusion. Another thing he had never imagined finding joy in one day. But he did. And not only because it made their bed adventures so breathtakingly intense.
No, it was more the little things.
Like abiding to different schedules but still finding ways to combine their free time without sacrificing something else.
Like knowing all the foods he really enjoyed as well as all the reasons behind them. The same of course also applied to foods he did not enjoy. Be it because he genuinely didn't like them or because they didn't agree with him.
But back to the most cherished one in his world. The one he would never willingly want to part with.
Inui would always curl up with him on the couch after the afterglow of another spectacular session. There, nothing more adult would happen. Like it was sacred ground. What would happen however, was them being bodily close to each other while Inui had his nose inside one of his many notebooks.
Tezuka never brought a book himself. Preferring to just observe and enjoy the moment. What he even more enjoyed though, were Inui's unconscious - and still unmentioned - reactions whenever Tezuka decided to paint small circles into Inui's skin with his fingertips. Earning himself soft shudders and even the occasional moan. All deliciously unchecked and unnoticed by his boyfriend.
Yes, this was definitely his most cherished facet to date. And no matter where they would move to next, Tezuka would make sure that particular couch came with them.