From Chibi Manga:
Natsumi has frequently been absent to school as she has very poor health and the only one who worries about Natsumi is her homeroom teacher, Kujou-sensei. Usually, Kujou-sensei doesn't even bother with his students and his personality just like ice, but even so, why did on that time, he really care about me....?

Collection of stories:
Koori o Tokasu Kiss no Netsu
Kiss wa, Kokuhaku no Mae ni.
Kawaii Kimi to Amai Koi
Kare wa, Watashi no Koto ga Suki Mitai Desu.
Juudai Sentimental