Passion Series by Shinobu Gotoh, Shouko Takaku

Student and teacher. Man and... man. Taboo upon taboo is what Hikaru and Shima have to overcome if they want to pursue their feelings for one another. Uikaru, a second year high school student, is obsessed with Shima, a male teacher. Surprisingly, Shima is not averse to the boy's affections. He even convinces Hikaru to study hard so that when he graduates, they would openly become lovers. However, Amamiya, an ex-lover of Shima, steps into the picture and tries to win him back... moreStudent and teacher. Man and... man. Taboo upon taboo is what Hikaru and Shima have to overcome if they want to pursue their feelings for one another. Uikaru, a second year high school student, is obsessed with Shima, a male teacher. Surprisingly, Shima is not averse to the boy's affections. He even convinces Hikaru to study hard so that when he graduates, they would openly become lovers. However, Amamiya, an ex-lover of Shima, steps into the picture and tries to win him back. Will Hikaru and Shima's passion prove great enough to hurdle all the obstacles stacked against them? less

Student and teacher. Man and... man. Taboo upon taboo is what Hikaru and Shima have to overcome if they want to pursue their feelings for one another. In this final installment of the two-part "Passion" series, Hikaru and Shima's relationship takes on a more serious tone when the pair begins to see each other regularly every weekend. They agree to have this arrangement until Hikaru graduates. However, Shima eventually seems to tire of it... moreStudent and teacher. Man and... man. Taboo upon taboo is what Hikaru and Shima have to overcome if they want to pursue their feelings for one another. In this final installment of the two-part "Passion" series, Hikaru and Shima's relationship takes on a more serious tone when the pair begins to see each other regularly every weekend. They agree to have this arrangement until Hikaru graduates. However, Shima eventually seems to tire of it. As Hikaru's graduation draws near, will his relationship with Shima, his teacher, end as well? less

Shima, a high school teacher, and Hikaru, now a college student, are currently lovers in a long-distance relationship. Burdened with preparations for the upcoming school festival, Shima can spare no time for a date, until he happens to hear a rumor that Hikaru, working part-time in a cafe, is being approached by an older co-worker there! Will the thought of an unknown rival competing for Hikaru's affection stir feelings of jealousy in Shima's heart?!

A long-awaited rendezvous with his long-distance lover leaves Hikaru's heart aflutter. However, things never seem to work out as planned with this couple. Hikaru ends up stuck at work and his co-worker Nagisa bumps into Shima-sensei as he waits for Hikaru in front of the school building. Nagisa finds Shima-sensei incredibly cute and adorable and invites him for a drink since his night with Hikaru is ruined... and Shima-sensei says "yes?!"