So how exactly did Luhan push Jongin to his death?

News spreaded throughout the whole school like wild fire: Kim Jongin had committed suicide. Luhan and Sehun were the most shocked because after all, Jongin is their best friend, how come they never knew that Jongin was a suicidal person? But what if someone actually pushed him to his death? 'And then there is him, whose appeareance turned a bit more paler than usual a day after the incident...'