I want to get married! Shall we begin with sex?

We set our scene in the Meiji era.

Having lost her grandmother, Shirafuji Sana found herself completely alone. With nowhere else to go and nothing to eat, she turned to the Imperial Army and its strange 'bride thorn' program.

Bride thorns are girls offered up as rations to the Vampdolls - blood-drinking women conscripted into the Army as its fiercest soldiers. Starved, desperate and completely unaware, Sana was made to sign an enlistment contract, only to be promptly introduced to Hanafusa Yukine, a beautiful, yet scornful Vampdoll.

At first, the two were far from an ideal match. With time, however, little by little, they began opening their hearts to one another. On their first night, they learned just how exhilarating - physically, emotionally - sucking blood can be. This came as a shock, but the two, awkwardly, trustingly, successfully made it through their first feeding.

Not long after that, they were sent out for active service and Yukine was incapacitated in the fighting...

A lonely, overweight, bald adult NEET lives a repetitive, empty life of endless gaming, junk food, and isolation.
His only source of real emotion comes from playing online games with the only online friend he has.
One ordinary day, that online friend suddenly appears at his door! And it turns out that all this time his online friend was (grasp) a woman! It’s Uzaki Hana, and she wants to hang out!
 

Another day for a poor guy who is trying to make ends meet. Unfortunately, his hobby can’t get him any money, so he has to find a part-time job for at least a week. Will he be able to do his job and not get fired?

A lonely, overweight, bald adult NEET lives a repetitive, empty life of endless gaming, junk food, and isolation. His only source of real emotion comes from playing online games with the only online friend he has.
One ordinary day, that online friend suddenly appears at his door! And it turns out that all this time his online friend was (grasp) a woman! It’s Uzaki Hana, and she wants to hang out!

You are Aeolian, a decadent demon noble ruling a remote corner of Hell. Through your... “charisma”, you've created a land both orderly and depraved.
One day, your trusty aide Juliet finds a runaway girl—none other than Flow, the Demon King’s daughter, fleeing a political marriage.
With quick (and horny) thinking, you vow to escort her across the 18 layers of Hell—not just to return her, but to propose to the Demon King!