The man next in line for the throne is currently in a headlock. He wants a comfortable, low-obligation life. His childhood friend Hikari disagrees with this plan. In the middle of arguing about it, his chest lights up with magic. The two of them wake up in an unfamiliar coastal city with no explanation until a woman identifying herself as the country's chancellor appears to provide one: they were caught in an emergency royal recruitment procedure that involved pulling them across dimensions. He is now the king. He needs to marry immediately. Build a harem, produce heirs, develop the kingdom — so say his duties. He is afraid of love. His new situation has not left him any room for that fear. Brides accumulate quickly: a princess from a neighboring country, a beautiful noble with her own agenda, and then Hikari herself steps into the competition. He just wanted a regular romance. He is getting five at once.