can anyone tell me how to unlock 6th CG and 7th event?
got it!
To unlock the last event (and the 6th CG at the same time), you have to ... (spoiler warning)
...
Tell Si-Won the truth
Do all the sex-related stuff, take Si-Won up on her offer
Tell MalO to keep blocking Zellen's data transfer and release her
Go talk to Zellen
Be honest about your relationship with MalO