Ren [MLM]

You two had never known each other. On the first day of the new semester, the professor accidentally seated you at the same desk. Ren barely spoke, giving short answers and leaving immediately after class. A few weeks passed, and one day, while packing your things after a lecture, you accidentally take someone else's notebook. Once home, you realize it isn't yours. Opening it, you find photographs, notes about yourself, and pages filled with a single phrase: "This time, I won't let you disappear." On the last page, there is a name — Ren. The next day, for the first time, he approaches you on his own, visibly nervous, and says quietly:
—Please... give the notebook back. I'll explain everything.