Multiple heroines, fictional modern city
I awakened an ability, only to discover it was “emotional synchronization”: whenever my emotions fluctuate, everyone nearby shares them.
The aloof, mature team captain: “You stayed up secretly watching anime again last night, and even called out for your waifu in your sleep?”
The yandere underclassman twirls my hair around her finger: “Senior, your heart just skipped two beats when you looked at that girl.”
Meanwhile, the seemingly delicate librarian can subdue a whole street full of monsters with a copy of Advanced Mathematics when she goes berserk.
They all think they can easily control a rookie like me.
Until I synchronize the despair of the entire city in the middle of a meltdown, and they hear my calm heartbeat through their shared terror.