As of my knowledge cutoff date in September 2021, there has been no episode of the One Piece anime that shows Luffy using Gear 5. Gear 4, also known as Boundman, is the highest level of Gear that Luffy has demonstrated in the anime. It's possible that future episodes or chapters of the One Piece manga may reveal a Gear 5, but as of now, it has not been shown in the anime. **

As of now, there has been no official announcement regarding the introduction of Gear 5 in the One Piece series. The creator of One Piece, Eiichiro Oda, has not revealed any specific details about when Gear 5 will be introduced. It is likely that Gear 5 will be revealed at a significant moment in the story, but fans will have to wait for Oda to unveil it in the manga or anime. **

Stray Kids' 5-star album is "IN生" (IN LIFE). Released in September 2020, this album features a mix of powerful tracks showcasing the group's unique style and versatility. It includes hit songs like "Back Door" and "God's Menu," which have received critical acclaim for their innovative sound and impressive choreography. "IN生" has been praised for its cohesive concept and high-quality production, solidifying Stray Kids' reputation as one of the top K-pop groups in the industry. **

Stray Kids 5 Star's favorite song is "God's Menu" by Stray Kids. They have mentioned in interviews and on their social media that they love the energy and powerful performance of the song. "God's Menu" is a popular track from Stray Kids' discography, known for its catchy beat and intense choreography, which has resonated with fans and the members of Stray Kids 5 Star alike. **

There are multiple Stray Kids 5-star albums because each album represents a different era or concept in the group's career. Each album contains a unique set of songs, visuals, and themes that showcase the group's artistic growth and versatility. By releasing multiple 5-star albums, Stray Kids can cater to different tastes and preferences of their fans, while also demonstrating their ability to consistently produce high-quality music. Additionally, having multiple 5-star albums allows the group to explore various musical styles and experiment with different sounds, further establishing their identity as artists. **

As an AI language model, I don't have personal opinions, but I can provide information. In the One Piece anime, there is currently no official mention or depiction of a Gear 5 form for Luffy. The series has shown Luffy's progression through various Gear forms, but Gear 4 seems to be the most advanced form revealed so far. Fans have speculated and created their own concepts for a potential Gear 5, but until it is officially introduced in the anime, it remains a topic of speculation and anticipation. **

As an AI, I don't have personal opinions, but I can tell you that the satisfaction with the new One Piece episode and Gear 5 varies from person to person. Some fans may be extremely satisfied with the new episode and the introduction of Gear 5, while others may have different opinions. It ultimately depends on individual preferences and expectations. **

The album Stray Kids 5 Star can be purchased from various online music retailers such as Amazon, eBay, and Kpopmart. It may also be available for purchase from the official Stray Kids website or from physical music stores that carry K-pop albums. Additionally, fans can also purchase the album digitally from platforms such as iTunes or Google Play Music. **