i can see rinka going into souvenir shops to get him keychains or trinkets he can bring with him places, in hopes that maybe ten'll at least think of her a little more when he's with other women (if he even chooses to bring it; most of the time, i imagine he keeps them hidden in the dorm room).

she's oblivious that he's purposefully dating women that look like her, thinking she just needs to become "more his type"—when that's not needed at all. another thing she'll try to do is bring him homemade food, or even just take-out... something to bring to him, an excuse to see him and have his eyes on her for a moment longer.