I believe she lost it and goes crying to Rinnosuke about it. Maribel of course found it, because of theoretical Yukari=Maribel reasons, which leaves Renko to wonder how she came across it.
Poor Yukari, always at the short end of everything and the first person to blame for everyone
What is the meaning of this!?I d-did NOT!!You took one of my goods without asking again!So long as it doesn't cause any bother, that's fine, but...I get the feeling Mary's ability's been running wild recently.Look, Renko, look!When I woke up this morning, this awesomely retro game system was under my pillow!