Classic usual perspective netorare.
Basically, guy goes around working and studying while doing some minor opinions, saying to the girl to be closer to character or not and so on. Then she goes, drinks some drugs influenced by girl who hates her and different than the older ones, this includes the "social media" point of it. You as the guy needs to work to buy/pay for the elements and menus(freeing the follow up, even câmeras and so on). Once u have all the items or start on adventure mode, Q opens girl window(w to change to sexual stats) and E to open the guys. The game have a flow of days... for events to happen/she gets trained, the guys needs their libido higher than 110% and the girl needs to be around 90+%.
Once dates pass and u get to see all events and have enough money, u can jump into recollection room and interact with the nebulous stuff and also "pay" work money to open the scenes from the girl perspective. She goes from a "k cool, love only boyfriend to... my boyfriend said i needed friends/interact with u then trap from other girl, sex friend and then blackmailed by 3rd guy who wants to turn into slave. Basic ntr stuff... all while the focus of the CG's are all on social media than the actual game if u're on the guy perspective...
Kaito only starts acting upon her once Seiya considers her training done. Basically, the sex stats needs to be 80+ Mouth, 100 boobs, 100 pussy, 30 ass before Kaido starts blackmailing her/interacting and they also exchange notes on the ntr twitter. You can get all events in single playthrough though also needs to get the work value on the computer to advance story somewhat... basically, don't do the mini-games and don't interact with girlfriend at all. Also be a dick on choices and u will get it all.
For the lazy guys attaching a save with all this done on adventure mode within recollection room, all opened after story clear. Too lazy to play/watch i guess...