I like Travel Event, the droppable girls are great, and i'm especially fond of Travel Kalissa. Her grade 2 (the one with flames) is amazing. Also, I like that their affections scenes tell some short stories (again, i'm mostly thinking about Kalissa), but the best imho is Travel Juliet, whom affections scenes bring some character development (her power fruit that gives her the ability to create hands, ability that we can see "somewhere else"): it's like the haremette start to have a life and development. They are living their own adventures while hero lives the main story.