Um
To finish FHM ,you must meet him right after your Garden crash FH and say sorry to him,then he will ask you to meet his pupil(do you know this boy?,he is around FH Junk Shop).Meet him and talk for three or four times(until he make can catch a fish) then remeet the FHM and follow him to the Junk shop you will receive something(maybe a Mega Phoenix) continue follow him to the inn and have some information about Esthar.