F/SN game?

ok i saw this Video from you tube i was wondering if what is the name of the i had a guess that it was the F/SN visual novel but now im confused can someone help me please if this isnt the F/SN VN then can you tell me what it is???

That's crucis fatal fake, a F/SN fighting game made by lights....

more info on this thread.

thank you now im happy -chita!- ^_^