Monica's Study is a Coromon Quest you can find in the Library of Hayville.
This quest is available during part 2 of the Coromon Walkthrough (just after you save Perrin from a Beezel!).
Monica is studying hard so you can join Lux Solis. She wants you to find a beginner book Coromon Basics in the library to help her with her studies.
You can find the book on the second floor where Merrin is hanging out. The book is hiding in the bookshelf.
Give Monica the book for your rewards.
Rewards:
- Oki Fruit x2
- Dip Fruit x2
- Skill Flash 50