The game can and will feel like a drag after defeating the 'first' Boss, also because the wholesome cutscenes will start to repeat themselves after a while. But I kept going because I couldn't miss out on defeating Dark Lord without hearing this banger once again.
The first time my team got kidnapped and my job sealed was unexpected and I dealt with it, also because my relationship and my job level would've made the game too easy and that's understandable. So YES, the game has A LOT of content, and can keep you busy for a long time, but you can get pulled out very easily if repetitiveness gets too unbearable.