I just read it not that long ago but I can’t find it again. Kagome goes to another school to get a potion or something to make Inuyasha love her. But she runs into Sesshomaru and spills his drink so he takes the one meant for Inuyasha and the potion ends up working on him instead. He then starts following her around and demanding she go out with him. Slowly Kagome starts to fall for him too. I know in the end that Sesshomaru had gone to the person that gave Kagome the potion to pay her for helping him trick Kagome.