Sekitou Elegy, Yonensei Recommendations
What I HATE about romance series is how, typically, the ENTIRE duration gets spent on a couple getting together. They usually end when there's no more drama to be milked from the 'will they won't they' scenario. If you're lucky, you get an epilogue to close off the story. If you're unlucky, NOTHING; maybe just a kiss.
This is why Sekitou Elergy surprised me. It's 15 volumes long and within the first few volumes the lead duo meet, kiss, have sex and start living together. Instead of all the fannying about leading up to a relationship, in Sekitou you get see a relationship developing over time