A bit of explanation of what Dream C Club is thanks to wikipedia:

The goal of the game is to achieve a “happy ending” (not as sordid as it sounds) with a hostess working at the club by repeatedly visiting her there and eventually winning her heart. Visiting the club costs money which is raised by doing part-time jobs which are performed by simply selecting one work option from among two to four, after which the result of your work is immediately displayed and money is collected. Money is spent on club entrance, drinks purchased there for both the player and a selected hostess, and on gifts for hostesses. The majority of the game is spent at the club one-on-one with a hostess of your choice, trying to raise her level of affection for you by answering her questions in a favorable way, giving her desired presents, and scoring high on mini-games which include karaoke performances by the hostesses during which you time button presses along with the music, as commonly done in music games. Your performance over repeated visits determines whether you will achieve a happy ending with a particular hostess, or are left lonesome and unable to return to the club again due to expired membership or triggered a certain event that causes both of you to remain as friends only rather than lovers.

12►

A short plot summary of what’s Love Plus thanks to wikipedia:

Love Plus takes place in “Towano City”. You, the player, transfer to Towano private high school. In this city, there are three girls with whom you may have a predestined encounter. Through school or part time jobs, memories and feelings accumulate between you and the girls. During this time, the girls only regard you as an important “friend.” However, the girls soon begin to notice a faint feeling… The girls earnestly feel, “I want him to love me,” and adjust to your tastes while giving their best. And so comes the fated “confession” day… With strong determination and courage, she conveys her feelings with all that she has. But it’s not the end when you are told her feelings. The “confession” is just the prologue. Starting now, your never ending story together begins.