Readers often find the increased vulnerability in Volume 2 makes the characters more relatable.
Sotsugyousei - Doukyuusei Wiki | Fandom
The first volume hooks you with the thrill of forbidden (or at least, awkward) love. The second volume asks if that love has a spine. It trades the butterflies of a first kiss for the weight of a "Where are we going?" doukyuusei manga volume 2 better