
Im confused about M's story? Happy ending or what?

"M" as in Misha/Mikhail Illyich? The series ends with him eating lunch with Doctor Gian and things appear fine. The proper translations should clarify things though. It ends at a stage where another series could be introduced, maybe a follow up of the main couples in a few years time as we saw with the progress of Misha's story which reverted a few years back into his background with Ilya .
Be my waifu yayung