Futsutsuka na Kyuuketsuki desu ga, Suenagaku Yoroshiku Onegaishimasu

Itaru is a normal salaryman, but his wife is a vampire! She may look cool and composed, but she loves her husband a lot and is the absolute cutest when she occasionally acts lovestruck.
A lovey-dovey, endearingly frustrating and heart-pounding romantic comedy of newlyweds.

(Source: Comic Walker, translated)