Kono Danshi, Sekka ni Nayandemasu.

- the characters are a kind of humans mixed with precious stones - they are very esteemed, but despite this they face several difficulties because they are half jewel 

student x teacher relationship 

both are about a shy character becoming more social and finding love 

by the same author. both bl stories have a similar sort of storyline, however robotica is a bit more sad :'( 

both have student-teacher relationship both BL both incredibly perfect <3 

both have younger x older guy relationship both cute