I would be so glad to see the pairing that I didn't want to get too specific, but here are some ideas that might be fun:

1. Misaki has a heartfelt conversation with Tadokoro/Kagami/whoever about how to deal with Tsurugi.
2. Someone starts stealing into the house to leave Tsurugi notes of affection, which he thinks are from Misaki.
3. Jiiya decides to interfere in the matter.
4. Tsurugi does something *sane* while trying to win Misaki's affections.