Does anyone know the source for these pictures? I got it from portrait packs but I don't remember which one. And I kinda already edited and renamed them so no tags. Google Image search return empty.

The style reminds me of kagami hirotaka (Taimanin Asagi). Not sure if he is the actual artist though.

Wow, you know your stuff. Not yet can confirm if he's the artist, but I found similar what I'm looking for. Thanks for pointing that out.

Found it. It's from a game, Tokubetsu Jugyou 3 SLG