Plug is a "Charger Girl" from a parallel dimension. Her job is to find depressed humans in our dimension and charge them up to revitalize their energy.
Episode 1
Whilst looking for some targets to charge, a charger girl named Plug encounters Sento, who can actually see her and hit her. Plug notices his sister, Hakone, is showing a lot of depression, but Sento refuses to let her stick a giant plug in his little sister's back.
Episode 2
Whilst trying to charge up some targets, Plug finds herself beaten to the punch by her colleague, Alesta. They then start to notice a lot of repeaters, people who have already been charged but have become depressed again. Plug goes to Sento for some advice, who says the simply charging them won't fix the cause of their problems.
Episode 3
Alesta gets put in charge of taking care of Plug, something she greatly objects to. Whilst finding Plug at Sento's house, she is hit by Sento once again, and soon becomes aware of his ability to see and touch her. Wondering why Plug hasn't reported such a matter to the office, Alesta is then insulted when Sento implies her job is something 'an idiot can do'.
Episode 4
Sento and Hakone's childhood friend, Iono, has a crush on Sento, but can't find the right moment to confess.
Episode 5
Sento, his boss, Hakone and Iono go to the beach, whilst Plug and Alesta, also on their day off, decide to go too. Whilst enjoying the sun, Plug notices a writer on a slump behaving strangely, despite being ranked E.
Episode 6
A kid named Kenta has become so depressed, that the counter-current from those that try to charge him causes a severe electric shock. He is given a Z rank and is deemed out of bounds for charging, but Plug can't help but feel like she should do something.
Episode 7
Alesta is scolded by her chief for allowing Plug to get injured. Plug herself is fine, but her arms are severely damaged, so Alesta has to look after her area whilst she recovers. In order to get Plug to delete embarrassing footage of her crying, Alesta agrees to be her maid, wearing an outfit made of anti-stealth materials, allowing her to be seen in the real world.
Episode 8
Plug gets scolded for trying to get back to work before her arms had fully healed, but her chief allows her to lock onto targets whilst Alesta charges them.
Episode 9
Plug and Alesta get called to Chief Pulse's office where they are introduced to the Rouden-chan (leakage girls), Reka Galvini and Kuran Shunt, who monitor electrical leakage, and are accused of smuggling electricity. The Rouden-chan also reveal they are aware of Sento and accompany Plug and Alesta on their next run.
Episode 10
As everyone gets ready for Christmas, the Juuden-chan have their work cut out for them. Reka and Kuran visit Sento and warn him about Houden-chan (discharger girls), who steal people's positive energy.
Episode 11
Hakone notices something weird about Sento. Meanwhile, Rona, who is annoyed that there aren't any other people who can see her, goes on a depression spree, alerting the Juuden-chan. The whole department is sent to help the affected, but they find they have to charge each target ten times to get them to drop.
Episode 12
Alesta tries her best to recharge Sento, but to no avail. Plug meanwhile is shocked to find Kenta has returned to a B rank. Hakone and Iono arrive and manage to get Sento out of their funk on their own.
