What Webcomic Is This

zombie apocalypse, strong MC with glasses in a crew of guys he doesn’t like. Has one guy he likes to protect, gets caught up in a gnu organization where he has to sacrifice himself for his friend. Other MC has red and blue eyes and is the one that keeps the main character with glasses.

What was that one manga where the student sees a man get a boner on the train and tries to blackmail him and then gets kidnapped?

As far as I remember, guy moves back with his father to and old home far away from the city. He has his new room that contains a secret passage way to the attic. There he finds a mysterious phone that links him to another guy on a different timeline I think. What is this webcomic? I'd like to reread again.