I'm sorry if someone already mentioned this but isn't this the couple from Saa Koi Ni Ochi...

LOL this is the page
http://www.mangago.me/read-manga/mr_convenience/an/mr-convenience-chapter-2.html/17/

haha. That's amazing! What a great observation! :)

Haha I was just about to mention that! XD Man, I love crossovers

Me too! I think that's why I love junjou romantica, sekai ichi hatsukoi and Katekyo! so much (≧∀≦)

I already noticed it when they mentioned Super Motteke & if you look closely I think those 2 children on his shoulder are those twins. They where same striped clothes :3

Here compare it yourself:

http://www.mangago.me/read-manga/mr_convenience/an/mr-convenience-chapter-1.html/7/

http://www.mangago.me/read-manga/saa_koi_ni_ochitamae/mf/v01/c005.1/1/

*I mean: wear same stripe pattern clothes

The one in the apron looks like Ayumu, too. XD