Manga rec

My friend who's new to manga and anime and asked for a recommendation. Anyone got suggestions fulfilling ALL criteria below?
- Suspense, thriller, psychological stuff.
- Completed
- short (she doesn't really know how long is long either)

Also, I think the art should be nice so that she doesn't get turned off. Thanks! (=・ω・=)
2021-01-09 16:41 marked

Photo from sangwoo comedian

you have no authority to read this
2020-12-08 18:47 marked

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