That's the downside of a true slice of life story I suppose, no big hook or novelty factor like ReLife had.
The only goal or overarching plot is mentioned right there in the synopsis in the first post - four screw ups trying to prevent having to repeat a year. People will either dig the whole coming of age thing of them working & growing together or find it boring as hell.
The MC starts off really weak too, they needed to flesh him out more way earlier than they did. Until we got those extra details of his backstory I didn't find him sympathetic at all & was more interested in all the other characters.