Tentacles Party With Nuns

This is a choice-based VN.

Carissa is the most beloved nun at the Cathedral of Saint Estelle.

One night, she has a dream about a witch being violated by the Templar Knights. When she awakens, she discovers that the atmosphere of the entire cathedral has become eerie.

It starts with herself losing her chastity to a tentacled creature resembling an octopus.
There are cases of serial dismemberment within the cathedral, people succumbing to bizarre forms of madness or committing inexplicable suicides, all accompanied by a faint sweet scent.
The entire cathedral is shrouded in an unknown fear.

The Cathedral of Saint Estelle has been cursed by a demon returned from hell. It is foreseen to be doomed in five days.

Through the friendship and communication between the characters Carissa and Betsy, players assist the protagonists in attaining a happy ending in this lifetime, while unraveling the mysteries of the past.

In this cathedral cloaked in darkness—demons, epidemics, war-wounded soldiers, forbidden potions, lurking serial killers, and the ancient taboo alchemy—much like destiny, these elements come together like a grand overture for a party that intricately link the past and present lives of the main characters.

Unravel the mysteries and curses, and embrace a new future.

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Carissa is the most beautiful nun and is famous in the area
She is very kind and helpful
But she's also often careless enough to screw things up
To her, Benson and Betsy are friends and like family.

Betsy is very smart and helps the cathedral solve various difficulties.
She also often helps the careless Carissa.

Betsy has complicated feelings for Carissa.
Although she is jealous of her, she cannot hate her.
She grew up in the same orphanage as Carissa, and she exists like Carissa's sister.

She is very good friends with Benson and Carissa and is secretly in love with Benson.

Benson is the adopted son of Bishop Carl
Handsome and knowledgeable, quite popular.
He is quite polite to everyone, but he also has a sense of distance because of it.

Benson often has inexplicable scars on his body.
He did not mention why. Only Betsy noticed this.
Benson has noticed Betsy's feelings for him, but his current attitude towards her is still the same as usual.

Good friends with Carissa and Betsy.

Bishop Carl is the leader of the cathedral.
He is a gambler and has a lot of gambling debts, so there have been a lot of rumors about him recently.

The mysterious woman who appeared in the cathedral one night seemed to be related to the devil and alchemy.
A man who came to the cathedral one nightExtremely obsessed with Carissa
The killer who committed quite a few serial dismemberment cases,
his cruelty is outrageous.
Smiling graffiti drawn with the victim's blood will be left at the crime scene,
and is known as the "Smiling Murderer" by the outside world.

Since the identity of the murderer cannot be determined,
there are currently only a few eyewitness testimonies,
Some said he was a "tall and thin young man" or a "man" wearing strange clothes and a mask.
There have been similar cases in the cathedral recently, could it be...?