Here, you can go on 'dates' with your kares.
By using a date ticket, you choose which kare you want to date. After a short phone call with him, you will be prompted to choose which day within the week you want to date him.
On that day, his attack and defense stats will rise by 70%. You also get more attraction points during jobs and meetings if it isn't filled yet.
It's very useful to date kares during events as you can get a huge increase in stats. It only lasts for one day, so plan carefully.
Dates go by JST, so make sure you pick the days carefully.
You also unlocked voices when you date a kare.