The Dangers in My Heart Vol. 12

Kyotaro has made a tough choice. He and Yamada aren't going on any dates until his entrance exam but all that studying doesn't seem to be helping and his grades have stagnated. His depression turns to anxiety when a visit to Yamada's house isn't what he expected at all. Her parents aren't home! It's just the two of them! What kind of mood is Yamada trying to set?!