Maru has been tasked to find a place known as "Heaven" and is escorted by his "big sis" Kiruko Takehaya in a world where the Great Disaster occurred a number of years ago. Kiruko herself was trying to trace old acquaintances too. As they discover new clues and meet other survivor...

It's summer break. Idol group "Orange Sunshine" member Yuki "Smile" is an influencer that enjoys live streaming but keeps a mask on to hide her buckteeth. Shy poem loving Yui Sakura "Cherry" works part time at a day care while always carrying a Kigo seasonal poem dictionary aroun...