Carved 2 (2008)

AKA: Kuchisake-onna 2; Slit-Mouthed Woman 2; The Scissors Massacre
Directed by: Kotaro Terauchi
Starring: Rin Asuka (Mayumi Sawada), Yukie Kawamura (Sachiko), Mayuko Iwasa (Yukie), Akihiro Mayama (Seiji)
Country: Japan; Effed Up Asian Films
Language: Japanese (Eng Subs); Effed Up Japanese Cinema
Runtime: 01:38:41
Genres: Scars, Gruesome, Teen, Siblings-Family, Killer

Plot – Spoilers:
Shilled as the prequel to Carved, not sure why, because the backstory was already covered there.

Teenager Mayumi from a small town is the fastest runner at school. As one of the popular girls, she’s snarky to her admirers but nervous around her crush, who though moving away to Tokyo, seems keen. So things are looking up. She’s even about to get the room she always wanted after her older sister’s wedding. But a few days later, a jilted ex of her sister breaks in, mistakes Mayumi for the sister and dumps acid on her.

Scarred and low on confidence, Mayumi finds she doesn’t have too many friends anymore and sinks further into depression despite the best efforts by her sisters and starts to wonder if she is pretty enough.

With a handycam tone to it, this is strangely enjoyable for a while before spiraling down slasher absurdities.