Nosogi Ren from Evening Starter, a game by Barony Sengya (Danshaku Ryou/男爵領)
Her game is basically the Shin Megami Tensei (by that I mean the dungeon crawling) to Kozue Strange Journey's Persona, even one of the bgms feel like it's a reference to smt II's encounter theme.
Description
keywords: nosogirenes, black hair, twintails, very long hair, sidelocks, yellow eyes, earrings, choker, black shirt, juliet sleeves, long sleeves, corset, belt, black skirt, thigh boots, high heels