Your sansaka yp headcanon’s makes me wonder if 20+ years down the line, Onoda still gets butterflies after being with Manami. Onoda could wake up next to him in bed, with the moon light hitting his face and he’d blush and hold onto his hand tighter before falling back asleep.
Onoda will never completely get over the butterflies, he still gets them almost every time they’re alone because he’s the sweetest kid in the whole world and is ridiculously in love with Manami, and even after so many years of being together, sometimes he still can’t believe that he really has this, that he is so lucky that Manami really wants to be with him, and when he thinks about it he feels so happy that it’s like he’s back when they first started dating, when everything was new and he got flustered for every little thing that Manami did. He doesn’t get so flustered anymore, obviously, he’s comfortable with Manami in a way that he isn’t with anyone else (even though Manami still has the power of making him incredibly embarrassed, when he wants to), but the butterflies are still there - it’s a normal feeling, after so many years.
There are some moments when it’s partcularly difficult to keep them at bay, like when he wakes up next to Manami and he looks at him so calm and peaceful in his sleep, looking like an actual angel; and in moments like that he feels so in love with him that he’s not even sure how he can feel so much without exploding. So he gets closer to Manami, holds his hand a little tighter and hides his face in the crook of his neck, hiding his blush even though no one his there to see him.
But, sometimes, is the other way around, you know, sometimes is Manami who still gets butterflies in his stomach; like when he looks at Onoda falling asleep next to him and he finds himself incapable of looking away, so he keeps staring at him and the butterflies are there, and they make him feel alive, in a way that before meeting Onoda only riding up a hill could make him feel.Â