Missing Road (4) At the End of Reason in the Fluctuating World Moegi Bunko Pually

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Through the power of Ritsushu's arrows, Koshiro Hiroki, who goes back and forth between the present day and the different world "ルマルシャン", fell in love with Yisan, a prince of Lusektan Province, and lived sweet days.
However, when Hiroki learns that going back and forth between the two worlds brings distortion to space-time, he is worried. At that time, his old enemy Alessandro attacks Yisan and others?
Life or death, eternal love or farewell. The answer Hiroki gives is --?
A huge volume of extremely popular Different World Pure Romance! The long-awaited latest issue!