Is there continuity in the story of the eternal Isu?

I'll just talk about the version on PC (YS for short).

The plot of YS 1 and YS2 can be connected. It is said that the protagonist of YS, "Red Goat" (the name was given by the player), Atalu was obsessed with the ancient legend of "the country of Isu", crossed the sea blocked by the boundary and came to the former site of Isu-Estella, where he met Fina, a woman with amnesia, and Leia, a bard. Under the guidance of the soothsayer Sarah, Adao began to collect six legendary "books of Issu" and began his adventure in Astaria, where Warcraft frequented ... (YS 1 above).

(YS2) A Dao, who collected six Books of Yi Su, was sent to the haunted place by powerful force. After being rescued by Lilia, a girl from Guangming Village, Adao launched a new round of adventure in the air mainland. Fina and Leia are actually the twin goddesses who created Izu! The history of the ancient Yisu kingdom, the Six Gods and the "Black Pearl" gradually surfaced. ...

There is no PC version for YS3, 4 and 5.

YS6 tells the story that Atlu travels around the world after completing the YS2 plot, challenges the Canaan Vortex in the marginal waters of Allen's West Asian continent, is attacked by Romon Fleet and drifts to an island surrounded by the Vortex, meets the descendants of elves, and then defeats the evil forces.

YSF (note that it's not YS7, because YS7 doesn't have a PC version now) is a remake of Ys3. The story takes place two years after arturo ended his adventure in Astaria. Arturo, a professional adventurer, and his partner Dodge * * * came to Fergana, Dodge's hometown, to investigate a series of unexplained disasters. In contact with the young girl Elena, Atlu discovers that Elena's brother juster actually intends to awaken the ancient demon king Jia baram to take revenge. ...

YS0 is a prequel story, in which the protagonist is replaced by the descendants of the Six Gods-Yunika and Yuge, telling the whole truth about the kingdom of Izu 700 years ago. In addition, there is actually a third protagonist (hidden line) in this story.

This is the computer now.