Both are male teacher&female schoolgirl love stories. Both have male leads who have deadly diseases. And both are beautiful.

Both are touching but beautiful stories and both makes you cry a river over them. Both includes school romance, but as you can see in 1 litre of Tears they are not the fun kind of romance. And both dramas includes "deadly diseases". Kou Kou Kyoushi is also a masterpiece. Don't think too much and just watch it.

Both are touching but beautiful love stories and both makes you cry a river over them. Both are school romance, but as you can see in Koizora they are not the fun kind of romance, they include "heavy romance". Kou Kou Kyoushi was even heavier. In my opinion, Kou Kou Kyoushi was unforgettable and better than Koizora. So you should see it before you die.