Skeleton Knight In Another World Light Novel Volume 04

"Finally arriving at the magical spring that might cure his curse, Arc is astonished to find it is a hot spring! Deciding to give his weary bones a rest, he and Ponta dive right in, only to encounter something entirely unexpected. Meanwhile, Princess Yuriarna challenges Prince Sekt's underhanded bid to take control of the Kingdom. With royalty facing off against royalty, who will emerge victorious?"