Plot
The serious-minded Io and the pure-hearted Tsumiki feel they never want to be parted, but haven't become a couple yet. More than friends but less than lovers, they develop an awkward quasi-romance.
Main characters
Tsumiki Miniwa (御庭 つみき Miniwa Tsumiki?)
Voiced by: Rumi Ōkubo
The main female protagonist. Tsumiki is somewhat petite and dainty in stature. She has a tsundere attitude: She is sharp and sarcastic on the outside and loving on the inside. She is hopelessly in love with Io. Every time Io gives Tsumiki a pat on the head or Tsumiki sees something she likes, she grows cat ears. Tsumiki is unusually strong for her size, and this is often shown at Mayoi's expense. She is skilled at arcade games.
Io Otonashi (音無 伊御 Otonashi Io?)
Voiced by: Nobuhiko Okamoto
The main male protagonist. Dense, yet kind at heart. He is oblivious of Tsumiki's crush on him, but she is the closest girl to him regardless and maybe has feelings for her. He is usually seen spinning a pen with his hand, often fast enough to catch Mayoi's surprise at his hand's speed. At times, he unknowingly acts like a casanova. He is also quite strong, though not shown as often as Tsumiki, as shown during Sakaki or Mayoi's pranks and antics. Also, for some reason, cats are immediately drawn to him (whether this is a nod to Tsumiki's crush on him is unknown).
Mayoi Katase (片瀬 真宵 Katase Mayoi?)
Voiced by: Hitomi Nabatame
Along with Sakaki, she makes up the prankster duo in the friendship circle. Very savvy with electronics and almost never seen without her lab coat. She loves to tease Tsumiki with her crush on Io, which often brings her severe repercussions from Tsumiki herself. She tends to end her sentences with "nyan".
Sakaki Inui (戌井 榊 Inui Sakaki?)
Voiced by: Shintarō Asanuma
Io's best friend and partner-in-crime. Together with Mayoi, he makes up the prankster duo in the friendship circle. His sister owns a patisserie where he, Hime and Io also work.
Hime Haruno (春野 姫 Haruno Hime?)
Voiced by: Kaori Fukuhara
The clumsy and air-headed member of the group. She has a very sweet and innocent personality. She gets a nosebleed easily when she's excited or upset. She's also a part time worker at Hatch Potch.