The next main series session will be on the 13th of July. In this session, you will be able to exchange your main character with a side character, or make a brand new one and will be leveled to Lv. 5. In addition, you will now be able to play as two characters in the party. The EXP will be divided by how many players there will be in the session, rather than the total number of characters in the session.
See you in the next session