Throughout his summer vacation, a college student attempts to get with his ideal girl. But the situation is complicated by another man, and four other girls.
Following the death of his father, Takuya Arima discovers through his father's notes that there may be more to this world than he could have ever imagined.
When Kakeru's party falls at the hands of the evil ruler Lucifon, Kakeru travels back in time to help his younger self gather a new, stronger party to battle Lucifon successfully. On their journey, Kakeru encounters several women.
When Tsuyoshi rushed to school as usual, he found a girl who tried to help a kitten which couldn't get down from a tree. It was Minamizato Ai who had loved Tsuyoshi secretly for a long time.
