Sumire Seto- Ena Yuzuriha- Yua Hidaka | - I-ll Gi...

The likely answer: fragmented management. Sumire Seto is signed to a theater company that discourages excessive media exposure; Ena Yuzuriha refuses interviews and has no social media; Yua Hidaka’s band albums are self-released on Bandcamp. “I’ll Give…” may have been a one-off indie collaboration — beautiful but short-lived.

Fans regularly petition for a reunion or full release. So far, no official announcement.

Note: In the official series, the protagonist is Ichitaka Seto. There is no main heroine named Sumire Seto. Sumire Seto- Ena Yuzuriha- Yua Hidaka - I-ll Gi...

It appears there may be a confusion regarding the name "Sumire Seto."

Sumire Seto (瀬戸 すみれ) is a Japanese actress and former idol known for her delicate beauty and strong stage presence. She first gained attention as a member of the theater-influenced idol group “Sakura Gakuin” (さくら学院) — a training ground for future stars in the Amuse agency. The likely answer: fragmented management

Within Sakura Gakuin, she was part of the sub-unit “Kōkyō Gakubu” (orchestra club), where her proficiency with instruments and her soft-spoken yet confident demeanor won her a loyal following. After graduating from the group in 2016, Seto pivoted to acting, landing roles in stage plays and independent films.

Her visual appeal and expressive eyes have also made her a favorite in photobooks and gravure spreads, though she maintains a focus on dramatic roles. If “I’ll Give…” is a ballad or duet,

If “I’ll Give…” is a ballad or duet, Seto’s voice (soft, melancholic) would fit perfectly.