Tsuyoshi Imagawa is a 37-year-old member of the idol group Eternal Boys. He debuted as a child actor at age three and achieved his breakthrough role at age five through a commercial. His acting career declined significantly after entering junior high school.

Following this setback, he pursued multiple paths within the entertainment industry, including singing, dancing, and enka, yet none led to sustained success or achieved his dream of stardom. This established a pattern of professional instability and unfulfilled aspirations.

As an adult, he maintains a persistent drive toward achieving recognition despite previous disappointments. His name "Tsuyoshi" reflects traits like sturdiness, strength, and toughness, while "Imagawa" combines "now/immediate" and "river/stream."

In Eternal Boys NEXT STAGE, set one year after the group's formation, he participates in their continued activities. This includes securing minor acting roles in a television movie, reflecting his performance background, and performing in a new song sequence featuring elaborate stage costumes. The narrative highlights the group overcoming collective hardships and strengthening bonds through these experiences.