 If you liked
Spotted Flower
|
 ...then you might like
Mijuku na Futari de Gozaimasu ga
|
Both are comedies about a married couple and their problems to have sex.
Main difference is that on Spotted Flower you have one part actively trying to seduce the other, while in Mijuku the problems are less one-sided.
Personally I enjoyed Mijuku WAY more than SF. If you read Spotted Flower and you wonder if there's a similar manga but with better art, less annoying characters and situations and overall better chemistry between the main couple. Try Mijuku na Futari.