Fourth season of Yi Ren Zhi Xia.

On the last Valentine's Day before her high school entrance exams, Nana Suzuki tries to build up the courage to confess to her longtime crush. However, when her chocolates are accidentally ruined, she rushes back to her house to make more—not realizing that the microwave has been turned into a strange invention by her grandfather. Suddenly, six additional copies of Nana appear, each possessing their own extreme personality and a crystal that grants them magic powers! With her plans ruined, Nana vows to confess to her crush in her first year of high school. The only problem is that her crush is top student Yuuichi Kamichika, and following him to his elite high school will mean that she has to hit the books. With six new allies to help her, Nana begins to prepare for anything that the exam season might throw at her.

On days when Sunao is sick, or not feeling like going to school, she is called to take her place. She was born to this world when Sunao wished to have a substitute. No one knows that she exists, but she tries to do her best for Sunao whenever she is called. One day she talks with Sanada, one of her classmates. They become friends, but soon he notices that she is different from the original Sunao...he was the first one who did. She tells him to talk with her only when she has her hair half-up. Sanada does like she told him, and they enjoy their time together. As they become closer, she realizes that she has special feelings toward Sanada. But she doesn't know what will happen to her...if she, a replica, falls in love. (Source: Kadokawa)

This gag comedy series focused on the adventures of a bizarre superhero powered by special cooking and fights against various aliens and other enemies threatening the planet Earth.