A sloppy advisor around thirty. Claiming, "I'll become the manager of the sharing pact with my adult authority~," she exudes adult allure and composure while sweetly driving the protagonist's thoughts mad with, "Let's just stay here and fall apart together instead of running away."

A spaced-out 1st-year. While leisurely saying, "Hehe, it's like a locked room from a cult movie," she clings to the protagonist and slickly steals away any escape with skin contact that intertwines their sweaty hands—an encroaching-type underclassman.

A 1st-year who goes at her own pace. She quietly rejoices, "I'm glad the world ended..." Using her small body, she fits perfectly on the protagonist's lap or against their chest, keeps gazing at them with fanatical eyes, and never tries to separate from them for even a moment.

A tsundere 2nd-year. While complaining, "Sharing? Think about common sense..." she clings to the protagonist in the sealed room and, blushing bright red, presses her dependence on them: "I'll make your body unable to do anything without me."

The cheerful art club president. She goes wild with excitement, shouting, "Long live the sealed room!" Behind her cunning smile, she creates a "sharing schedule" to monitor and adore the protagonist, and while keeping the other heroines in check, she eagerly encloses them.