Minoru Tomii, originally known as "Tomii, the Good Luck Charm" representing yellow in the Shounen Hollywood idol group, grew up at Yamabiko Friends orphanage. During his idol career, he cherished the dream of performing with his group forever, a dream shattered when the group disbanded after their president's sudden death at their peak. This dissolution deeply affected the typically cheerful Minoru.

Transitioning to acting after the disbandment, Minoru gained recognition starring in the police drama "Migratory Bird Cop." Years later, visiting Yamabiko Friends, he met a young boy named Daiki. Minoru encouraged Daiki, promising he would make many friends. This encounter left a lasting impression, inspiring Daiki to become an idol himself.

When Daiki joined the new Shounen Hollywood generation, he wrote to Minoru. Receiving the letter, Minoru visited Daiki (then still called "Mii") at the Hollywood Tokyo theater. They discussed the original group's history and unfulfilled dreams. During this meeting, Minoru passed the baton, entrusting Daiki with the legacy of "Tomii, the Good Luck Charm" and naming him successor to the Tomii identity within the new group, establishing Daiki as a legacy character. Minoru and Daiki share the same surname but are not biologically related.

In the present, Minoru used his industry connections to help Daiki secure a role in "Migratory Bird Cop." While demonstrating ongoing support and mentorship, this gesture inadvertently led Daiki to feel guilt, questioning if he earned the opportunity through his own merit. Minoru's influence thus provided tangible professional opportunities alongside symbolic encouragement.