Fire Emblem Awakening: Summer Scramble 2

Set after Fire Emblem: Awakening, Chrom clearly has not learnt his lesson from his last experience in Hotrealm, which becomes evident when he considers an invitation to return there for a vacation. Feeling it wouldn't be best to go alone after what happened during the last visit, he requests for Gaius, Cordelia and Tharja to accompany him. While all three of them are initially unsure about going, they each agree to go with him for their own personal reasons. What does Chrom hope to gain from going again? Why is Cordelia flustered about returning there with Chrom? And what are the true intentions Gaius and Tharja have regarding to pair?