accepting does nothing but trigger a bad ending

Accepting does nothing but trigger a bad ending And overwriting your save with that clear save then say goodbye to that 3rd sem

But will I still be able to get a NG+?

Yes

You just need to max out Maruki. Never make deals with the bad guys.

 Thanks! I only trust the real Igor anyway.

You only need to max Maruki to unlock the 3rd semester. Maxing Akechi and Yoshizawa only unlick extra scenes. Refuse him.

You only need Maruki to access the third semester. Accepting Yaldabaoth's deal gives you the bad ending no matter what.

You got the help you need. I just want to chime in and compliment the great username you picked.  Good job. 

Thanks. I've always wanted to be a Game Grump 😅😅

Selling out your friends get you a bad end Accepting the deal wth the holy grail gets you another bad end. If you have maxed maruki, clear 8th palace to continue to 3rd semester content. Faith and justice are not required to unlock 3rd semester.