two songs that are very HijiGin coded to me are Bruises & Bitemarks by good with grenades and Nicotine by patd

hijikata and maybe Takasugi too and even Tsukuyo and Madao too who cares and I'm all up for Gintoki being fucked by all the smokers anyways all of them thinking how Gintoki's lips taste so much better than cigarettes and becoming addicted to him