@nymphella 3rd comment about the toy:
Spoiler!
It's a paddle. He spanks Jigu with it, and Jigu cu** while crying (I personally call him "cry baby jigu") and then says he hates being hit. So Yeowoon says okay we won't use the paddle again............ except later in a bonus chapter, they do, while Jigu is tied up, and Yeowoon uses it to wake him up because he's asleep, and Jigu ends up enjoying being spanked from that point forward