"Issei is one of the main characters of the Japanese manga series ""Let's Do It After We Marry"". He appears frequently throughout the story and plays a significant role in the romantic plot.

Issei is a handsome and talented young man who comes from a wealthy family. He is known for his skill in both academics and sports, as well as his confident and outgoing personality. Despite his many admirers, Issei has long harbored feelings for his childhood friend and fellow classmate, Tsugumi.

Throughout the series, Issei struggles with his own indecisiveness and fear of rejection as he tries to muster the courage to confess his love to Tsugumi. He is often torn between his desire to pursue a relationship with her and his sense of duty to his family and their expectations for his future.

Despite his own struggles, Issei is a loyal and supportive friend to Tsugumi and her partner, Itsuki. He often lends a sympathetic ear and offers advice, even when it may not be what they want to hear.

As the series progresses, Issei's character undergoes significant growth and development. He learns to be more honest with himself and others about his feelings, and eventually finds the courage to take a bold step in pursuing his relationship with Tsugumi.

In the end, Issei stands as a compelling and relatable character, whose journey from uncertainty to self-assurance is both touching and inspiring."