I Kept Pressing the 100-Million-Year Button and Came Out on Top, Vol. 5 (manga)

Shortly after they return from the joint summer training camp with Ice King Academy, Allen and his friends are suddenly called to Lia-s homeland-Vesteria. There, they-re told by Lia-s father, the King of Vesteria, that the end of Lia-s study abroad has been decided...! Will Allen be able to change the king-s mind before Lia transfers away?!