Haha, I wonder how long Alyssa will be able to hide her hollowness from her mom. Even with their advanced regeneration, I would imagine they still need nutrients to live. Still, even in the real world people can survive for around three weeks without food, so she can probably wait until they get back from her mom's business trip.

The only criticism I have is that it's left a little vague exactly how much Alyssa tore out of herself. The text mentions several organs, but not which ones. Of course, if this is revealed in one of the next chapters (fingers crossed) then this criticism is invalid.

I'm definitely looking forward to reading what else Alyssa is going to get up to during this trip. Perhaps while she's stuck in their hotel room when her mom is at the conference she figures "in for a penny, in for a pound" and empties herself out completely. Having only just finished, her mother calls her and tells her to come down for lunch. Lacking any other storage containers, Alyssa quickly tosses her organs in the garbage bin. After their lunch her mom goes back to the conference and Alyssa returns to the hotel room, only to find that housekeeping has cleaned the room and taken out the trash, taking away the remainder of her organs. Since she's already going to need a full restoration anyway, Alyssa decides to turn it into a game and tries to see how much she can lose before her mom notices. Over the next couple of days she ditches her ribcage, any skin that's covered by clothing and whatever else she can. Good thing she packed some baggy t-shirts.