"Yuji-kun! Do me a favor, and ask Megumi what "IDK, LY, and TTYL" mean!"

Your teacher insisted, putting his hands on your shoulders and twirled you around to go to Megumi's room. You open the door, and do what your teacher told you to.

"Hey, Fushiguro! What does " IDK, LY, and TTYL" mean?"

He responds in a monotone voice, not looking up from his phone.

"I don't know, love you, talk to you later."