There's a Reason Why I Can't Get Married.

I want to be married... And someone like Tomizawa would be perfect!

Mariko, 29, wants to seal the deal by 30. However, marriage requires affection and Mariko's affection is reserved to a man she can respect! She's single at age 29, also aware that she can't let go of her pride. One day, a chance to date THE ideal-candidate, Tomizawa, falls right into her lap!! Delusional or not, she can't let anything jeopardize her opportunity to hear those wedding bells ring. A chaotic private life and dramatic sequence of events keeps her on her toes. Is marriage even on the table?!

(Source: MangaPlaza)

Note: The digital version has six volumes.