If you're looking for manga similar to Haganai: I Don't Have Many Friends OVA, you might like these titles.
Having earned his boss' displeasure, Wilfried, who became a royal magician at a young age, was demoted and thrown into the weirdo's den, the division who did nothing but eat. He is assigned to be Ester's personal chef and his job entails feeding her and stopping her from running away from work.
Senshado. The number one tank warfare martial art. With a philosophy to hone a maiden's polite grace, dignity, and femininity, it has been regarded as the choice for maidens across the world. But to those that choose to master it... They must first follow another path: The Art of DINING.
Mamori Kurisaka, an university student living alone in Tokyo, secretly longs for her next-door neighbour, designer Youji Agata. One day, Mamori stumbles across Youji's secret: not only is he keeping an overflowing vegetable garden on his veranda, but his everyday attire of trackpants and jersey is nothing like the bespoke suit Mamori normally sees him in! On top of that, he mutters something about quitting his job?!
Snuggled in a friendly traditional commercial and working-class neighborhoods of Tokyo is the izakaya pub, "Bottakuri." In this special restaurant with an ill-fitting name, one can find tasty sake and delicious food, as well as the sort of empathy and respect that's hard to find these days…