Youichi is the "lucky" guy who started his new life as a salaryman; hoping Kagura would be a normal job. But as soon as he entered the building, he meets with a phantom cat that had planned on killing him. Luckily, Kikushima saves him and informs Taba about the work. Since his first day, he became a receiver of near-death situations; usually yelling about how he'll quit Kagura whilst his impulse and instinct help fight the phantom cats.
Most of the girls take a shine to him in one form or another; with Kikushima being the most upfront about it. But Taba feels better around Takami and Narusawa; the former because she doesn't either point a weapon at him or force him into danger, the latter because he considers her one of the few sane women he meets.
(Source: Wikipedia)