Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 7 - 7-19. A Night No One Knows

Witnessing her boyfriend cheating on her with her bestie, Shiyao was so angry that she went to a pub for fun and met a man, who was really a piece of work. After a crazy night she fled away, but was embarrassed to know that the man she slept with was her boss You Ze.
Jesus, give her a break!

- Description from Novelupdates

Being able to see into people's past has no real appeal for the teenager this story is about, letting him use it only as amusement and to show off when he was drunk.Never watch into someone's past beyond a superficial level.Never try to find out more than you should.NEVER. EVER. LOOK. INTO. THE. FUTURE.But everything changed the moment he was forced to look into the future, was forced to investigate a murder, and was forced to make the acquaintance of the victim's twin brother('s fists).The more time passed, the more it appeared that the primary reason for this murder wasn't a local problem, but a global one.This single, marred corpse was the beginning of a threat that would shake the world.(MC looses a screw when he enters the prison)BL, first-person view; MC is shuo (perhaps even a reversible couple); love interest falls in love first; both MC and ML are straight, mutual bending, Enemies to Lovers

An ordinary (?) grandfather, Choi Chuntaek. In an effort to protect his granddaughter, he started the virtual reality game 'Arkstar.'

Then... he accidentally obtained a legendary class?

She thought she was dead but she woke up inside a novel – to an extra who will die a year later.Not wanting to die like this, Alexa decided to tame the male protagonist in the form of a dog. Two years from now, the male lead will return to his human form. In the meantime, she was thinking of leaving the Grand Duchy after receiving the right pay for doing them a favour.The problem is that when the male lead returns to his human form, he forgot all his memories.“You have to remember me, okay? There’s no point in looking so cute. Promise me!”She told him many times because she didn’t want to mistakenly die by the male lead’s hands, who became a villain.But,“You told me to remember, so I remembered everything. Alexa.”Ysildus unbuttoned his jacket.“If there’s no other way to return that favour then I have to pay it with my body.”A cute puppy that grew up into a weird wolf.Damn, what did I raise?