Well I did a bit more progress on the backgrounds today, as some kind of update I think il post a few more details about the game's literate bits, every time I imagine the game in my head it gets more and more detailed, so I know alittle more about my characters and locations now, so heres what I have so far:
Stage 1: Passing Trough the abandonned village
Midboss (youkai character, ghost, female) She decided to stay home after her unfortunate death, she socializes and lives amonst the youkai who live there now, over time she learned magic and became somewhat of a threat.
Boss (youkai character, water demon, male) He's often seen patrolling the lake outside of the village, causing trouble for the humans who travel across, hes friends with the ghost, and is pretty unhappy about the protagonist's hostility towards her.
Stage 2: Blue Forest Hidden in Fog
Midboss: (Anthro character, Wolf, Male) The protagonist learns that the spreading human to anthro transformations have already been happening for awhile, this character lives in a town close to the border between the two divided areas and was one of the first to get affected.
Boss (Youkai Character, Witch, Female) She lives alone deeper in the forest, shes pretty cruel towards everyone, especialy humans who try to get rid of her, her plan is to capture an anthro and give them a more intimidating appearance to keep as some kind of guard dog.
Stage 3: Magic-Sealed Border Road
Midboss & Boss: (Youkai Character, Guardian, Male) Hes a youkai but hes very close friends with the anthros, being a guardian he stops anyone who tries to pass trough the border, atleast until hes too tired to fight...
Stage 4: Lively Town in A New World
(the characters stumble onto a festival here, the anthros seem to be having a big celebration)
Stage 4 midboss: (Anthro character, Deer, Male) He seems to be some kind of self-proclaimd town guard, he senses that the protagonist is a newly-transformed and finds the protagonist extremly suspicious.
Stage 4 boss: (Anthro character, Squirrel, Female) She's popular amongst the other anthros, shes very lively and she's quite an acrobat, she possessed two magic hoops, she seems pretty adept when it comes to danmaku fights.
The rest is still being debated in my head, but im pretty satisfied with how im imagining it so far ^^