Red Velvet's Irene released her debut full-length album 'Biggest Fan' on the 30th, marking her return approximately 1 year and 4 months after her first solo mini album 'Like A Flower.' The album contains 10 tracks featuring various emotions discovered in everyday life, showcasing a wider musical spectrum across diverse genres. Despite being known as the entertainment industry's representative 'cold beauty' with a sophisticated and cool image, Irene possesses unexpected charm filled with aegyo and lightheartedness, which she authentically expresses through her music. The title track 'Biggest Fan' is a pop-dance song featuring an upbeat bass and rhythmic drums, completing the narrative where Irene first discovers her own confidence before creating a mutual connection with fans as each other's 'Biggest Fan.' In the track, Irene delivers a chic tone with lyrics like 'My worth, this colorful aura, it's all within me,' before raising her tone to extend her hand to listeners with 'Now I understand, worries are pass, I'll give it to you,' moving toward solidarity and mutual support. The album captures Irene's journey of becoming her own strongest supporter amid unwavering fan encouragement, conveying genuine warmth while addressing special emotions in mundane daily life and hope blooming from disappointment.