Makiko Nagaoka 
You Were Experienced, I Was Not: Our Dating Story 7th Date (Light Novel) [EPUB ebook] 

Continuing directly from where the previous volume left off, Ryuto finally reveals what went wrong that day at the end of his second year of high school. Now that his and Runa’s relationship has become Too Much of Spring, what will it take for it to see a more traditional kind of development?
Meanwhile, Maria’s search for a boyfriend continues, but the hunt seems to be heading in a dangerous direction…
Summer approaches, and so does the couple’s trip to Okinawa, with a special meaning behind it. Will they finally do it this time?