Hundred Years as an extra 

It started as a female reader from modern era dies and reincarnated or transmigrated or possesses  to a body / character of the novel she read before .This character she reincarnated is named Dahlia and she is an alcoholic depressed . Dahlia transmigrated and was trapped to the time loop magic spell in her county named Acrab and was waiting for the Magician who later becomes her  teacher to save her from the time magic . After she was saved dahlia suffered from depression and the effects of her alcohol withdrawal and from the suffering she experienced during her hundred years stay in the time looped magic in Acrab .She also learned many things there except magic. During her stay to her teachers place they slowly get close but not yet too close just above normal but far from being extraordinary char hahahahaha .

The ML is a shy bastard who acts aloof and indifferent but is compassionate person.