simply

Axl, Slash and Stephanie met at the rainbow bar. They smoked and drank wine. Axl and Stephanie fell in love but Slash loved Stephanie too. They got married in a church.
When Axl and Stephanie leave the church, Axl forgot to bring the ring with them. Stephanie was sad. When Slash walked along the street and sew a gun shop. He thought that if Stephanie live with Axl, she won't be happy.
However, at the wedding party, it started to pour. People hid and screamed because Slash appeared with a gun in the rain. He killed Stephanie.
Axl cried in the rain, in front of Stephanie.
Axl cannot foget that horrible scene. He needs to use medicine ever after.