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How old is Kei Kusanagi?

Published in Anime Character Age 2 mins read

Kei Kusanagi is 18 years old. While he appears and is often perceived as a 15-year-old high school student, his true age is greater due to a unique medical condition.

Understanding Kei Kusanagi's Age

Kei Kusanagi's age is a central aspect of his character in the anime series Please Teacher! (also known as Onegai Teacher). Despite attending high school alongside typical 15-year-olds, his actual age is eighteen. This discrepancy is attributed to a rare and unusual disorder.

The "Standstill" Disorder

Kei suffers from a condition he refers to as a "standstill." This disorder periodically causes him to enter a state resembling suspended animation or a deep coma. During one such prolonged episode in his younger years, he experienced a "stunted growth" period that lasted for three years. This explains why an 18-year-old individual might maintain the physical appearance and developmental stage of a much younger teenager.

This unique condition not only impacts his physical development but also plays a significant role in the series' plot, particularly concerning his interactions and relationships.

Key Facts About Kei Kusanagi's Age

To clarify the details surrounding Kei Kusanagi's age, here's a quick overview:

Aspect Detail
Actual Age 18 years old
Apparent Age 15 years old (due to disorder)
Condition "Standstill" disorder, causing periods of suspended animation and stunted growth
Impact Three years of growth stunted due to a past coma
Series Title Please Teacher! (or Onegai Teacher)

For more information about the series, you can visit its official streaming page:

The Significance of His Age

Kei's actual age, contrasted with his appearance, adds a layer of depth and complexity to his character and the narratives he is involved in. It often creates humorous and sometimes dramatic situations, especially given his mature perspective hidden beneath a youthful facade. This hidden maturity is a key element in his interactions with other characters.