Midori lost her mother when she was young and now her father's gone too. But her dad left her with a surprise: a fiancée named Tetsuya. So now, Midori has to live in a good-looking men only apartment (Harem Lodge), which is actually filled with weirdos. What is going to happen to her? Well we just have to wait and see…

Rui is a beautiful and studious high school student. However, because she is so direct, she has often been misunderstood, so now she is the subject of absurd rumors, and alienated by the rest of the girls in her class. Then one day, a chance encounter with a free-spirited guy named Shou turns Rui's meticulously-ordered life on its head. And so, a "rainbow school daze" between a super dry girl and a care-less guy begins!

During its early stage, it's hard to notice it. During its intermediate stage, it's still difficult to discern it. It hurts. It makes you cry. That's right—this is what you call "First Love." The most popular guy in the school falls in love for the first time in his life, let's see how this story unfolds!