logic course of action would be:
inuzuka: dude, how the fuck am i going to cheat on her if we are not dating to begin with? also, if you declare that you are spying on someone to that person then thats not spying anymore...and pretty much explain well how things are between everyone there.
but noooo we will be going the full misunderstanding route where kougi realizes that inuzuka is a nice guy and this and that happen and so kougi and inuzuka become friends at the end.