Sono Hatsukoi wa Amasugiru: Renai Shojo ni wa Shigeki ga Tsuyoi

Chizuru's a stoic 30-something office worker who's never been anywhere close to a nightlife district. As luck would have it, the company drinking party she participates in is in such a district, and a turn of events leads Chizuru, the ever prudent and judicial type, to sour the mood. Unable to endure being there any longer, Chizuru skips out on the after party and runs into a pack of impudent hosts on her way home. She's saved however when a handsome looking man in an expensive car comes to her rescue. "That's classic you", says the handsome man to Chizuru, and upon closer inspection he turns out to be Tsukasa, a childhood friend. In order to take over his parents' business, he's working as the lead host at a popular host club. After a 10 year reunion, conversation goes well and Chizuru let's Tsukasa know of her intentions for marriage. Hearing this, Tsukasa invites Chizuru to work at the club in order to get accustomed with men in general. Though she was hesitant, the weight of their enduring friendship convinces her to take Tsukasa up on his offer. Upon starting her work at the club, Tsukasa suddenly becomes extremely touchy-feely to the point that Chizuru can't hide her confusion. Could it be that possessive dreamboy Tsukasa's passion is too much for Chizuru... dangerous even...?! (Source: MangaPlaza)