Artist commentary via Danbooru:
Patchy's Super Slim
Alice: Whoa! You're light! Super light!!
Patch: What are you doing, exactly? I can't read like this...
Alice: Well, I was just thinking how thin you were... But you're way too light! Are you eating properly!? I'm worried you might break!
Patch: I thought I was going to break not long ago. Thanks to you...
Alice: No doubt you're skipping meals, spending all your time cooped up reading books, right!? No matter how much you're trying to compensate for a lack of magical power, all things in moderation! If you don't eat balanced meals and get some exercise, you'll never grow.
Patch: I'd really like to get back to my book...
Alice: I know! Let's go for a walk and have lunch outside today. We'll make boxed lunches. That sounds perfect!
Patch: Hey, Koakuma, don't just stand there laughing. Help me out here...
Koa: Hehehe. I'll go get a comfortable pair of walking shoes for you, then.
Patch: ...
Alice suddenly decided to pick Patchouli up in her arms as she was reading a book.
As for what happened prior to this, you can find out in the book I'm publishing this summer! lol"