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Note: This takes place after Kazuya returned from his "night out".
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No one knew what Kazuya did before he safely returned to the Shiroyuki household. There was just his little accomplice who held him tightly to cover up his absence during the night.
Tomoyo fell in and out of sleep the whole night because she was worried that her grandparents might discover his absence. She was worried that he might get scolded or even grounded if they discovered that he sneaked out during the night so she tried various things in order to make it seem like Kazuya was in her room.