YOU SAID:

My favorite anime so far is Demon Slayer

INTO JAPANESE

今まで一番好きなアニメはデーモンスレイヤー

BACK INTO ENGLISH

My favorite anime so I've ever had is Daemon Slayer.

INTO JAPANESE

私が今まで持っていたので、私のお気に入りのアニメはデーモンスレイヤーです。

BACK INTO ENGLISH

My favorite anime is Daemon Slayer because I've ever had it.

INTO JAPANESE

私の好きなアニメは、私が今までそれを持っていたので、デーモンスレイヤーです。

BACK INTO ENGLISH

My favorite anime is Daemon Slayer because I've ever had it.