Kaito Prefix Title Coupon

I think the hint answer is actually just Rundal Dungeon in general. I did Rundal Basic and ended up getting a title token at the end on accident lol.

This is hypothetical but look at this thread[1]. Basically Rundal Basic will give tokens but Rundal Siren will give a coupon instead of making you get 10 Tokens. This is just speculation until 100% proven, but so far it seems true because I rank a Math Adv for 2 and got a Token, but Math Advanced regular gave me the coupon.

I want to add in when I got my Kaito Prefix Title Coupon from Siren Dungeon. I did not have the note or rebirthed at all using the premium character card

Hm, just tried and it won't let me use it.

If what you are saying is true then a Special Note is not needed to get a Coupon/Token. However the Coupons/Tokens still have a drop rate because according to someone in the Mabination forums, they did not get a Kaito Coupon in Siren Dungeon despite having a note.