Baka to Test to Shoukanjuu‎ - Volume 9, The Third Question

In the post-apocalyptic age, men were damned.

Ayaan is a young resident aspiring to be a surgeon, the final stage of a full on graduated plague doctor. However, in her attempt to redeem herself after a sudden discontinuation, she finds herself unravelling mysteries about her institution that are rather gut wrenching. Stick around and watch her persevere in a world full of monsters; creatures and humans alike.

“Aiyo, this time someone’s going to die. This is going to be a big deal.”

She had transmigrated, and her architectural style had transcended into that of a village girl. How could she be so ungrounded?!

When she opened her eyes, she saw a group of people beating her up.

Mama, who can tell her what’s going on?

That patched up but handsome shy man actually liked her?

- Description from Novelupdates

The protagonist is an accidental time traveler - he didn't wait, didn't guess, only dreamed, but ended up in history, which he didn't pay much attention to. He was just lucky with his lineage.Ryo is a new member of the Nara clan, from the Uzumaki lineage on his father's side, and it so happened that he was born not at the beginning of the known plot, but more than three decades and two world wars later. Now he has to figure out how to get out of this situation however he can.