Rec, Danna ga Nani wo Itteiru ka Wakaranai Ken Recommendations
This anime is very similar to REC, its about the relationship with living with another person. The romance is sweet and very realistic. The only difference is that I think personally REC has a better sound track, art and story. REC definitely goes more into the relationship side of things with more drama, while "I cant understand what my husband is saying" goes into the more comedic aspect of life. Both are heartwarming relationships and are much more realistic most anime's. I would fully recommend "I cant understand what my husband is saying" to anyone who just finnished REC
Both are about adults in the workforce living together. Both have nice and cozy relationships. Both shows have simple art work.