Chaehoon has been feeling anxious since their communication sucks and start become jealousy so all kind of things make him suspect Ilhoo cheating and Ilhoo also felt the same.
Bruh they just need to build their communication better, even the smallest details like who you meet, what you do, and what kind of food you have could make you feels closer even tho you're separated miles away...
Everyone going crazy with Garam's ass hahaha