What to read after Toilet-bound Hanako-kun, Vol. 19?

Thanks to the manipulations of those in the broadcast room, Nene and Sumire find themselves trapped once more in No. 6’s boundary. While Hanako-kun isn’t there to help them escape this time, they aren’t alone—No. 6 himself is there as well! Sumire is thrilled to be reunited with her beloved after so many years, and with No. 6 having come to terms with his feelings at long last, perhaps they have a chance to change how they left things...