The latest installment in the Grisaia series: Grisaia Chronos Rebellion

In Grisaia Chronos Rebellion, characters from the original Grisaia Trilogy and Grisaia Phantom Trigger join their new friends in an all-out battle against a deadly terrorist organization.
https://store.steampowered.com/app/2348360/Grisaia_Chronos_Rebellion/

About This Game

"Grisaia: Phantom Trigger" is a visual novel. More specifically, it is a kinetic novel, without any branching routes. Returning character artist Akio Watanabe and writer Ryuta Fujisaki bring you the latest installment in the acclaimed Grisaia series, "Grisaia: Phantom Trigger".

Story:

While Rena and Maki recover from their injuries, the other SORD members jet off overseas for a school trip. Within moments of their arrival, though, the Mihama gang are pulled into a manhunt for a SORD deserter, assisted by students Sylvia and Velvet of St. Aile's International School. Tohka's the star of the show this time round, but she's wrestling with her own issues ? old memories of her parents, and a promise to a friend that she wasn't able to keep...

“You're right. There's a reason we need to get back... even if it means crawling home on our hands and knees.”

“Let's meet up again someday... if we're still alive.”

And introducing Sengoku Ayame - Sengoku Ichiru's brother, and a handler at St. Aile's:

“If takin' her in alive's too much of a challenge, just get rid of her - I don't give a damn. I wanna see this mess cleaned up.”

What answers will Tohka find? She has the truth in her sight...

Mature Content Description

The developers describe the content like this:

This Game may contain content not appropriate for all ages, or may not be appropriate for viewing at work: Revealing Outfits, Violence, General Mature Content