That bit about obligation chocolate culture reminds me of how it was here during the pandemic. People hate being told they have to stay at home, but they don't mind staying home if they're allowed to go out but are recommended to stay home by a non-political healthcare professional. Here in Sweden we had roughly the same reduction of people moving about as in other places that did force people to stay home.
Tsuji's fretting about it like a schoolgirl giving chocolate she's tsundere about.
Kabedon reverse chocolate best surprise. So that means she should give back on White Day.
Ambush: Success!
Ending sweetly as it should.