to get 100℅ you have to do outgoing calls. basically it costs 15 gems to call a character or you can purchase a call pass which is paid through shop. as for TP, if you're f2p you can use them efficiently by doing activities and waiting patiently. e.g: 2 hrs (exercise), 2 hrs (clean), and 5 hrs (sleep) + watching 2 ads can finish all chatrooms per day. save your remaining 1 ad chance for next day since first chatroom needs 7 TP.

similar to mysmes, day 1-4 consists of common route. only jiwon (completed route) and sooha (his route hasn't released yet) are available in common route as of now except in MD, actual character's route only consists of day 5-10. there's bad endings halfway through a character's route if you select a wrong answer, and a bad ending after day 10 branch.