"100 Nichikan Ikita Wani" is a slice-of-life manga series that chronicles the daily life of a small saltwater crocodile named Wani, who is adopted by a human family. The story begins when Wani is discovered as a hatchling and brought home by a young boy named Shota. Despite initial reservations from Shota’s parents, the family decides to care for Wani, leading to a series of humorous and heartwarming events as they navigate the challenges of raising a crocodile in a suburban household.

The narrative unfolds over 100 days, with each chapter or episode focusing on a specific day in Wani’s life. The series highlights the crocodile’s growth, both physically and emotionally, as he adapts to his new environment and forms bonds with the family. Wani’s interactions with Shota, his parents, and even the family dog provide a mix of comedy and touching moments, showcasing the unique dynamics of their unconventional household.

Wani’s presence often leads to unexpected situations, such as his attempts to mimic human behavior, his curiosity about household objects, and his occasional mischief. These moments are balanced with the family’s efforts to understand and accommodate his needs, creating a blend of lighthearted humor and genuine emotional depth. The series also subtly explores themes of responsibility, coexistence, and the bonds that form between humans and animals.

As the 100 days progress, Wani’s growth becomes more apparent, both in size and in his relationship with the family. The story remains grounded in its slice-of-life approach, avoiding dramatic conflicts or fantastical elements, and instead focusing on the everyday joys and challenges of living with a crocodile. By the end of the series, Wani’s journey leaves a lasting impression on the family, highlighting the impact of their shared experiences and the unique bond they have formed.