If you're looking for anime similar to Sweet Rein, you might like these titles.
Nobumasa is a boy who works part-time in a shoe store, where he meets Mizuki, a girl whose abusive family life has left her unable to trust other people. Meanwhile, Nobumasa is unaware that another girl, Seiko, has a crush on him but is unable to express her feelings.
Dejiko is now twenty years old and works part time in a bakery. On her way home on Christmas eve, she slips and drops her cake; but when a young man approaches and switches her spoiled cake for his, Dejiko is unsure how to respond. The young man is Senba Takuo, and their love develops over the next year. But when Dejiko receives a letter from her mother requesting her to come back to her far away home, and after she sees Takuo with another girl, what will become of their relationship?
It's Christmas Eve and Ichitaka, with his friend Yasuo, await a double date. While waiting for Iori and Nami, Ichitaka reminisces about his experience with his life-long crush Iori. There were many opportunities to finally confess his love to Iori, especially the time when the two were selected to arrange the freshman entrance ceremony; but Ichitaka was either too shy or often misunderstood. The biggest misunderstanding of all was when Ichitaka's childhood friend, Itsuki came to live in Ichitaka's home all the way from the United States...
It’s Christmas time and having gotten into college and recently leaving the Hanabishi household, Kaoru is finding it difficult to make ends meet. And to top it all off a strange pendant fell out of the sky and hit him on the head! That evening after dozing off, Kaoru wakes up to find a pretty woman looming over his bed who introduces herself as Santa Claus. In order to thank him for returning her pendant, ‘Santa’ agrees to spend a fun Christmas with Kaoru...