Just before a date with Osanai, Kobato runs into Kengo, who shares some disturbing news and leaves a strange message. Together with Osanai, Kobato tries to solve the mystery. However, shortly after, it appears that Osanai is in great danger.
The nature of this "Han" is such that 
there's too much info to communicate orally.
إنّ طبيعة عبارة "هان" هي أنّه يوجد الكثير من
.المعلومات الّتي لا يمكن التّواصل بها شفهيًّا
In dem „Han“ steckt eine tiefere Bedeutung,
die man nicht mit Worten ausdrücken kann …
La naturaleza de este "Han"
La naturaleza de este "Han"
Ce caractère de « moitié »
Ha scritto questo singolo carattere,
Na natureza desse "han"
Судя по всему, за этим «Хан»