A normal class with a not so normal beginning and ending

Sylvain went up to the class room, finding most of the class there, barring Annette0. As one, Ingrid, Mercedes and Byleth stood up as a breeze seemed to come in through the door. The girls each turned away from him and bend over, shaking their rears at Sylvain. Ingrid and Byleth were much the same as before, while Mercedes seemed to jiggle in place more. After a few seconds, the wind stopped at the three girls. Dimitri hadn't even shifted in his seat at the front during the whole ordeal.

"Sorry I'm late, I forgot a fresh quill!" Annette said, the redhead said as she ran in, brushing by Sylvain, who had been standing in the door watching the whole thing. "Ah, Sorry!" She apologized, Sylvain being made aware of his surroundings again and taking his seat.

Class was pretty normal from there, going over Black magic and skills with the blade (Sylvain only half heartedly taking notes on the latter, given his preference for spears). After the couple hours the lectures took, Byleth dismissed the Blue Lions, most of the class leaving. As Sylvain stood up, the professor stopped him. "Sylvain, could you stay after class? I need to discuss something with you and Mercedes."

Ingrid stopped and turned on the spot, looking at Sylvain with a look of deep suspicion, clearly communicating 'oh lord what did you do now!?'. "Don't worry, Ingrid." Byleth looked at the pegasus knight. "We won't be keeping him too long."

Ingrid still looked suspicious before walking out of the classroom. Mercedes closed the door after her, locking it. Immediately after, Mercedes folded and deposited her shawl onto a desk , Byleth merely shucking her cape onto the floor before reaching for her boots.

"What's this about?" Sylvain said, playing dumb as he watched Mercedes remove her dress neatly, taking her time to preserve it.

"Mercedes noticed you were having trouble paying attention during the lecture, and suggested we try something to help you focus." Byleth said, tossing her boots aside and dragging her skirt and panties to the floor at once. Her face remained as stoic as ever, not even a hint of a blush.

"Yup!" said the Blue Lion's motherly figure, blushing very hard as she watched the professor strip, taking care with removing her bra, though she seemed to get excited as Byleth got more naked. Maybe that was just the book acting on making her hornier before it started. (It's not the reason for her at all)

After both were stripped bare, Mercedes gestured for Sylvain to sit on a desk near the front of the room, Byleth picking up her cape before using as a caution on her own desk. "Sylvain, you will need your pants off for this." She said, still not blushing as she spread her legs.

Sylvain grins, putting his new tome on the desk next to him as he removes his pants, sitting on the desk, letting the shaft bounce a bit in front of the clergy woman kneeling in front of him. "Ah! So big! I hope this helps Sylvain, I haven't done this before." Her face was still red as she grinned lewdly, hefting her impressive chest up and around the shaft.