We managed to get to Yoosung★'s route by getting 54%-45%-63%-63% from day 1 to 4, participating in chats that gives green hearts to Eva [MC] while avoiding the rest of the members.
We are also slowly uploading the video walkthroughs so please bear with us. The link to the playlist is below - please feel free to bookmark it or share it with your friends!
A Good/After Ending tip to remember: I AM NOT RIKA!!!