Wow he can actually think. Onwards to after bath video call shenanigans.
Why wait for the after? Why not during?
Seriously though, I can see it both way for these twos.
Ikeawa makes some bold moves and score..but seriously can he just take the win. I mean not every moment needs to be part of their awkward competition.
Also as a other commenter mentioned Eguichi's already using line with other people so why would she be having trouble with it? If she keeps using it with those people she'd get better over time. The guy who made Ikeawa jealous and started this arc has been using line to message with her.
She is particularly nervous specifically because its Ikezawa. She fears she'll fumble it with him with her not knowing what to interpret or how to convey what she wants to say.
I supposed with the other guy it is work-related so she wouldn't have as much a hard time dealing with it and you have more leeway in that situation. Plus, she might not care that much about him feeling she being cold (more likely situation than he misunderstands she has feeling for him coz people in her situation would tend to go for overly short, stiff way of talking rather than overly friendly/flirty)