One of the many reasons Tsukasa loves Nasa so much is that he’s extremely reliable. He may not be the strongest guy, but whether it’s fixing Kaname’s vacuum or helping Aya avoid failing the year at high school, he earnestly helps out those in need without any thought of getting anything in return. He’s also modest, grateful to and respectful of those who came before him, like the great minds who developed the math he’s teaching the somewhat less great-minded Aya.
After preparing some worksheets that will help Aya with self-study, Nasa goes on to work on a project for a vtuber friend. Tsukasa can see that he must be stiff from sitting cross-legged and typing for such an extended time, so she insists her husband lie down so she can give him a massage.
Nasa admits this is his first massage, which makes Tsukasa happy since “she’ll be his first”. She’s also quite good. Not only does Nasa feel great because his muscles and joints are being taken care of, he also feels another kind of way that a husband feels when his wife is touching him.
He wants Tsukasa to feel good too, so when she’s done, Nasa insists she have a seat so he can massage her. She’s nervous, so only allows him to give her a shoulder massage, as long as he’s gentle. Nasa realizes he’s never touched his wife in this way, and that he feels just as good massaging her as he felt when she massaged him.
As we know Tsukasa and Nasa are not the most physically intimate couple, and a lot of the, shall we say, physical activities in which most loving couples engage both before or after marriage, don’t come easily. That said, day by day, little by little, they are becoming more comfortable with each other. That has a lot to do with how kind they know each other to be.
It’s ultimately Kaname’s conniving that jump-starts their physicality, as one day out of the blue she rudly asks Nasa how many times he and Tsukasa kiss and do it per day. She also informs him she’s been diving into the depths of blue YouTube, something I’m sure Nasa doesn’t want her talking about.
However, when Kaname produces a list she wrote up that indicates the various meanings of kisses to different parts of the body. Neck, ear, hand, hair…each kiss sends a different message. While Nasa isn’t comfortable discussing this with Kaname, he also doesn’t refuse the list she prepared.
That list makes Nasa’s subsequent interactions with Tsukasa a little tenser than usual, since he can’t un-read the list, and thus knows what he’d be “saying” to Tsukasa were he to kiss her here or there. When the two go out for an evening stroll after a grocery run, she catches him smelling her hair as it flows in the night air.
Tsukasa tells him he can touch her hair if he wants, so he does, though she’s a little weary of being seen out in the open. Nasa assures them it’s dark and “should be fine”, so the hair-touching commences. It’s interrupted when the two spot Yanagi-sensei with Taniguchi-sensei, who have clearly hit it off since they’re now going on evening strolls…and kissing.
When the bashful couple returns home, Tsukasa is given some green grapes by Kaname…along with the list of kisses. Nasa decides to use the opportunity to kiss her on the throat, indicating need. She counters with a kiss to the ear: seduction.
Gradually, the two start making out by kissing various parts of their bodies—while remaining fully clothed, and without getting too amorous, mind you! It’s cute as hell, and precisely the kind of stready yet significant progress one would expect of a couple still feeling their way though that aspect of their marriage.