Torokeru You na Kiss wo Kanadete

From Mangaupdates:
For two years, Neo-chan has been dating the vocalist Gaku. After their first night together, she writes and sings a song which overflows with her feelings for Gaku. After hearing her song, Gaku seeks out Neo’s talent… but when things become serious, a dangerous mood develops. The two then lose connection for 3 months. During that time, Neo finds out that Gaku has a major debut with the song she wrote?!

Creator:Mitsuki Miko
Status: Complete
Genre: Drama, Romance, Shoujo, Smut