Read the novel, it's awesome and much further into the story. You'll be shocked with some of the revelations (≧∀≦)
Sauce plssss
YOOOO THANK YOUUU! I DIDN'T KNOW THERE WAS A NOVEL
Spoiler alert!
Our cute MC saved ML when Sa-Young was a child. They created a bond, and Eui-Jae promised to come back from the rift, while Sa-Young promised to wait for him as long as it takes. They fall into a dungeon created by fond memories, and in this dimention the two live together sharing a room as a couple. Eui-Jae turns back time in order to save Sa-Young. I still have about 80 chapters from the translation, so I'll spoil more when I finish what's uploaded.
I STARTED TOO EARLY MAN, I LOVE THIS SO MUCH I SHOULD BE REVIEWING FOR MY EXAMS LATER BUT I'M TOO BUSY TRYNA FIND MANHWAS TO READ I'M SO FUCKED