After Seika's graduation it says to "Meet up with Seika at the slayers dorms." I have gone to to slayers dorms at every time period for 7 days and she is never there. Due to this I cannot progress the main story. Since when you talk to the man from the slayers guild the game tells you that you need to raise Ayane and Seika to level 3. And the game prevents you from sleeping to the next day because you have to go to the new base first.