I have discovered some voice actress, and communicated with them a bit. 

They have expressed enthusiasm about getting involved in a game project, and willing to discuss more about the terms and conditions.

CherryBlossomVO and tsuma-asmr, they both have medium voice pitch

These are their audio work.

CherryBlossomVO, https://www.newgrounds.com/audio/listen/1343868

tsuma-asmr, https://www.newgrounds.com/audio/listen/1342772

Thank you! I wanted to new voice talent for this game. Will contacted them when I'm close to finishing the game.