I'm Doomed if It Can't Be You

Best friends turned lovers in a single night...?

"The only one who can ever be with someone like me is you!!" Office worker Isejima suddenly goes down on his knees to propose to bar owner Yakumo, his best friend of ten years.

Jilted by his bride-to-be before their wedding, Isejima pleads his case about being single for the rest of his life and his fear of dying alone. Taken aback by Isejima's ardent words, Yakumo nonetheless feels moved enough to unthinkingly accept!

(Source: Tokuma Shoten, translated)

Note: Includes one extra chapter.