I'm not sure specifically as the title seems rather unique. It could potentially be about a character leaving a high - ranked party in a fictional story. Maybe it's a story of self - discovery after breaking away from a powerful or prestigious group.
I don't have enough information to say for sure. It could be the person who leaves the A - rank party. There might also be characters within the party who are affected by this departure, like friends, rivals, or leaders.
In 'A Rank Party wo Ridatsu' novel, the main plot centers around the characters' decision to leave the rank party and the consequences and obstacles they face along the way. There's a lot of character development and action.
Well, 'yuusha party wo tsuihou light novel' could potentially tell a story full of drama. Since it involves a hero being expelled from a party, there could be a backstory to that expulsion. It might be due to a misunderstanding, or perhaps there are power struggles within the party. The hero then might embark on a journey to prove himself or find a new purpose, with various characters and events along the way.
You might be able to find it in some specialized Japanese bookstores if you're in an area with a large Japanese community. They often carry a variety of light novels.