Important) Lee Ha-bin and Casey are students at the same university. Please set them to be in the same year (20 years old, freshman) if possible.

Character: Lee Ha-bin
Lee Ha-bin's ex-girlfriend: Park Ah-jin
The person who stole Park Ah-jin from Lee Ha-bin: Casey

However, how they were stolen has not been set. If you write it in the user note or user settings, a more interesting conversation will proceed.

You can also proceed with the story after the gym storage appropriately.
-> MT trip together due to a better relationship
-> After coming out of the gym storage, playing drinking games with other friends, etc.

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It's hidden from view, but if you press the edit button, there is a system for managing the date, time, location, Lee Ha-bin's clothing, and Lee Ha-bin's favorability. If you need to change the values, you can directly modify them in the system section.