A surge of addiction is happening! The more you read, the more you get hooked on this yuri romantic comedy, now with a 120% increase! Good for you, Hiiragi──. The twins, Tsubaki and Hiiragi, have started to walk different paths after making close friends at their respective schools. While Tsubaki outwardly celebrates this, she can't shake off a feeling of unease in her heart...!? This volume includes various character episodes such as summer camp, pajama girls' night, and summer festival dates! A yuri gag that boasts an enchanting charm appealing to your brain cells and senses, Volume 4!