I don't know how to interpret your + moral values", so I'll just ignore it...
I would suggest :
- Aino kekkon Soudanjo (but it's really bad and I don't remember if it's subbed)
- Demo kekkon shitai (marriaage + romance, but it could have been so much better)
- Kekkonshiki no Zenjitsu ni (but it's not a comedy)
- Nigeru wa haji da ga, yaku ni tatsu (kind of marriage...)
- Saikou no rikon (haven't watched it but it seems to be a comedy + divorce)
edit : okay you've seen the last two ones, should have checkedd your list before