Games like Hypersonic Speed Girl / 超速少女
Games like Hypersonic Speed Girl / 超速少女 include 永远消失的幻想乡 ~ The Disappearing of Gensokyo, Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil, TouHou Makuka Sai ~ Fantastic Danmaku Festival Part III, ICEY, and TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II. We matched them by the tags players give Hypersonic Speed Girl / 超速少女 on Steam (Action, Female Protagonist, Faith, Bullet Hell, and Anime): closest matches first, and among equally close ones the better-known games.

永远消失的幻想乡 ~ The Disappearing of Gensokyo
Shared: Female Protagonist · Bullet Hell · Anime

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Female Protagonist · Bullet Hell · Action

TouHou Makuka Sai ~ Fantastic Danmaku Festival Part III
Shared: Bullet Hell · Faith · Female Protagonist

ICEY
Shared: Action · Female Protagonist · Anime

TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II
Shared: Bullet Hell · Faith · Female Protagonist

Rabi-Ribi
Shared: Female Protagonist · Anime · Bullet Hell

Touhou Blooming Chaos 2
Shared: Action · Faith · Bullet Hell

Touhou Fuujinroku ~ Mountain of Faith.
Shared: Action · Bullet Hell · Faith

Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Bullet Hell · Faith

Touhou Hero of Ice Fairy
Shared: Female Protagonist · Bullet Hell · Anime

TouHou Makuka Sai ~ Fantastic Danmaku Festival
Shared: Action · Bullet Hell · Faith

東方憑依華 ~ Antinomy of Common Flowers.
Shared: Female Protagonist · Faith · Action

Touhou Danmaku Kagura Phantasia Lost
Shared: Action · Faith · Female Protagonist

Bloodstained: Ritual of the Night
Shared: Female Protagonist · Action · Anime

NieR:Automata™
Shared: Female Protagonist · Action · Anime

Gensokyo Night Festival
Shared: Action · Faith · Female Protagonist

Touhou Kanjuden ~ Legacy of Lunatic Kingdom.
Shared: Bullet Hell · Faith · Female Protagonist

Touhou: Scarlet Curiosity
Shared: Action · Bullet Hell · Female Protagonist

Azur Lane Crosswave
Shared: Action · Female Protagonist · Anime

Touhou Kikeijuu ~ Wily Beast and Weakest Creature.
Shared: Bullet Hell · Action · Faith

Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Bullet Hell · Female Protagonist

Danganronpa Another Episode: Ultra Despair Girls
Shared: Female Protagonist · Action · Anime

AI LIMIT
Shared: Female Protagonist · Anime · Action

Last Command
Shared: Bullet Hell · Female Protagonist · Action