The members of the Sigma Alpha Epsilon fraternity at the University of California Los Angeles showed they were more mature than the “frat boys” stereotype, entertaining a 12-year-old girl battling cancer in the hospital across from their frat house, according to CBS Los Angeles and Facebook.

Last week, Lexi Brown, 12, who has a sarcoma and cancer that has migrated to her lungs, was transported from her home north of Santa Barbara to UCLA Children’s Hospital in a room across from the frat house because her 2014 chemotherapy had caused her heart to fail.

She posted a request on her hospital window asking for pizza. When the members of the fraternity saw the note, they not only brought her pizza, they showed up with a guitar and roses, serenading her, as seen here:

Christian Wehrly of ΣAE told CBS Los Angeles, “You know, one of our creeds is being a true gentleman, and that’s following through and making sure that we can do everything we can.” The group followed their appearance last week by installing Lexi’s name in lights on the roof of their frat house so they she could see them. They plan to leave the lights there through the holidays, CBS Los Angeles reports.

According to a GoFundMe page created to help Lexi’s family cover her health expenses, Lexi rides horses and plays soccer; she has a big brother, Carter; and her father is a California Highway Patrol officer. She was first diagnosed with cancer in her left thigh in June 2014, had several months of chemotherapy and radiation, then went into remission in May 2015. She attended the Women’s World Cup in Canada in summer 2015, where she met the entire U.S. team In August 2015, the cancer was found in her lungs. On October 30, she was airlifted to UCLA Children’s Hospital, where they found that the chemotherapy in 2014 had damaged her heart.