Shiawase Ni Shitara Dame Desuka? summary:

Although wedding planner Ikuyama is foul-mouthed and has a terrible personality, he is popular with women due to his deceiving good looks and outward appearance. One day, he goes to a hotel designated by his client for a meeting only to find that the bride isn't there and that he is left alone with the groom, Izumi, who exudes a gloomy aura."Isn't it beautiful? I picked it out because I thought it'd suit you, you know... Ikuyama-san?"In the midst of the meeting, he is suddenly overthrown by a feeling of drowsiness and when he wakes up... for some reason, he's been put in a snow-white dress?!