The Warrior Prince by Rhiannon Wells

Gwynda didn’t expect to connect with anyone from planet Crass until she met Lothrik, the warrior prince…

When a Space U class takes a field trip to the isolated planet Crass to study their culture, Gwynda quickly finds their society regressive and barbaric. Although the Crassians are human, they’ve evolved in a big way – they’re taller, stronger, and they have no use for technology.
But when a sexy warrior prince named Lothrik takes an interest in the rebellious Gwynda, her views quickly change. Although the Space U students are only meant to observe and take notes, Gwynda can’t help but break the rules to get closer to the warrior prince.