This is Hiroi Kikuri, a character from the manga Bocchi The Rock. It's a story about rock bands. It's extremely common for rock stars with mental health struggles to develop crippling drug addictions that end up killing them, and receive no help from the people around them who brush off their struggles because of their musical talent, and Hiroi illustrates that. Drinking and smoking are bad, sure, but it's a realistic portrayal of a common real-life theme.