I do not think Mika will show up going forward, definitely nothing more than an afterthought. I think that it's rather clear that Watanabe has put that behind her and now looks forward, or more precisely, at Yoshioka. Get to it already, you bumbling mess of a girl.
Watanabe might have put it behind her but Mika hasnt.
To be fair she did feign interest in stargazing and even said she wanted to go when the forecast predicted rain, so half way between abduction and spontaneous trip.
OK, so two girls like each other "in a special way," they want to kiss each other, and kissing makes them feel "warm and fluffy inside." There's a name for that, I just know there is--tip of my tongue, tip of my tongue . . .
Two girls . . . what's that called? Damn, I just hate when this happens . . .