Death Note #4

Death Note, Vol. 4: Love - Tsugumi Ohba, Takeshi Obata

the new Kira turns out to be a model who is in love with Light. She has made the eye deal with her Shinigami. Turns out to be a hindrance to Light so she ends up giving up her deathnote, and hence all her memories about it are gone. Light ups the ante and requests lockdown for himself to prove he isn't Kira to L. Ends as he is going into his cell.