Mostly people interact through line like people drop their line id’s or join groups but if you want to talk to a particular person you send them a mail by visiting their profile
I experienced that too, also with other manga updates. I was able to read multi with a few but the majority I cannot read multi even though I'm logged in. Wtf dude!
I cant believe we only got 2 POSSIBLE (coz the future isnt set in stone) sex scenes and im not that mad abt it lmao. Plot is really good