Tonikaku Kawaii, also known as Fly Me to the Moon, is a romantic comedy anime series that follows the story of Nasa Yuzaki, a young man who falls in love with the mysterious Tsukasa Tsukuyomi. After a chance meeting, Nasa promises to marry Tsukasa, leading to a series of heartwarming and humorous adventures as they navigate their new life together. The series explores themes of love, commitment, and the everyday challenges of married life.