So far this Calendar is an easy task. There was no better couple than DongJeon couple - they grew with each other, offered each other comfort and unconditional devotion. Their easiness with each other made us (OK, me) feel warm and alive.
Honorable mentions below.
OK, a series not from 2019, but I just have to cheat.
Another one:
Aengdu and food being probably the main OTP:
And I really had a nice time watching them. Frustrating at times but somehow relatable.
To continue frustrating watch that I loved:
Of course Sherlock and Watson:
I also kinda shipped Nokdu with that fan, you know.