It's been a week since that kiss, and Otto and Karen have continued to get along in the same way, and nothing seems to have changed on the surface. But it's not hard to find that they spend more time together.

"Now, what are you doing?" Sitting on the bench, Karen shook her legs and turned her head sideways to ask Otto, who was tinkering on the side.

Otto, who heard Kalian's question, turned his head to look at her, and then went about his business......

"Researching a cure for the Black Death? How, interested? ”

"What!?" Karen jumped down from the lab table excitedly, knocking over a few bottles of potions.

Otto's brow twitched, those were precious medicines!

"The Black Death is not theoretically incurable, as long as I develop antibiotic ......," Otto, who was not sure if the viruses of the two worlds were the same, replied vaguely.

The Black Death is a virulent infectious disease mainly transmitted by Yersinia pestis through rat fleas, and the clinical manifestations are fever, severe toxemia symptoms, lymphadenopathy, pneumonia, bleeding tendency, etc.

In addition to the necessary hygiene, antibiotics – chemicals that interfere with the developmental functions of other living cells – are essential for treatment.

"Ah, I don't have a clue at all" Otto, who would have taken into account all the equipment he could use, scratched his ears and cheeks, how could he possibly understand this as an ordinary person in his previous life. As for Otto's memories? Come on! What would a medieval guy know about this?

"I remember what I learned in history class before, during World War II...... Penicillin. Well, that's right. Let's start with penicillin! Thinking of this, Otto ran to the laboratory's warehouse to rummage through the cabinets......

"Hey! Is there a cure for the Black Death? Looking at Otto, who was half buried in the cargo, Karen asked.

"No, I'm not working on it right now, am I?" There were voices in the pile, but it was clear that they were lacking in confidence.

Kalian, who sensed Otto's tone, raised her eyebrows, "I said you wouldn't be completely clueless, would you?"

Otto "......"

"Looks like you're right, you idiot. If Honkai is so easy to solve, what do you want us Valkyries to do! ”

"Well, you'll see." Otto, holding a moldy shoe, crawled out of the pile.

(I suddenly remembered that in the Chiyou chapter, the first lawyer, Val.) The manifestation of the special "infection" after the collapse is the appearance of dark spots on the face, which is consistent with the Black Death. Then Himeko gave him some kind of capsule drug, saying that it could only be suppressed temporarily. Suddenly I feel so tired......)

"Hey, Karen. Help me next! Holding his stinking leather shoes, Otto walked to the experimental table.

"I don't want it" glanced at the shoes in Otto's hand with disgust, and Karen turned her head arrogantly.

"Alright then, let's talk about reparations."

"Well, what compensation?" Karen, who was a little weak-hearted, asked.

Pointing to the valuable medicine that had been smashed to the ground on the side, Otto spread his hands and made a very embarrassed look.

"Isn't it just a few bottles of medicine? Miss Ben can't afford to lose? ”

"That's right, that's at least a year's worth of pocket money." Otto, who had a sinister smile on his face, said that the other party was just an idiot anyway.

"Let's, let's talk about helping."

With Kalian's help, Otto was able to extract penicillin from the moldy shoes within that day. I don't know if Alexander Fleming will really be stressed if he finds out.

In fact, Otto also found out. Recently his mind has become more active, in other words, his brain has been developed more deeply.

As we all know, the potential of the human brain is endless, but in fact, the brain supplement development of ordinary people is only less than 5%, and the later generation of Einstein is only 10%, and the remaining 90% are dormant.

However, Otto can be clear and unequivocal that his brain has recently been developed. The reason for all this is that it can only be caused by a series of calculations in the blue-eye state, the kind of computation that takes into account the 210th power possibility of 10 at the same time, and excludes them one by one in combination with the scenario to reach a near-predictable point.

"Ah, just thinking about it makes my head hurt......"

looked at Otto, who suddenly covered his face and thought in pieces. Kalian beside her was also confused.

Thanks to that mess, his calculation at this moment has increased by dozens of times compared to before. It's great that I didn't burn out my brain at the time!

"I haven't eaten for another day today, I'm so hungry."

"It's not because of you, why should I suffer together"

"Ah, let's go to my place and eat it. I'll show you ......."

"Here, onigiri. Ah, what did you just say? Karen, who was nibbling on a rice ball the size of her face, tilted her head and asked Otto, who was about to speak.

"No, when did you take out the rice balls?" Otto, who was immediately serious, did not feel the slightest embarrassment.

"Just now," Karen, with a look of foolishness.

"Smack" Otto covered his face, I never noticed that you were black.

Under the moonlight, the two sat on a bench and ate rice balls. Although there is a distance of more than an arm's length between each other, it is surprisingly warm.

"You unexpectedly like to eat balls, and the last time was too."

"Really?"

"You're on a mission tomorrow, right?" Although it is a question, it is a sure affirmative tone.

"Huh?"

"After all, you've been off for a week."

"Can I rest too? I'd rather go to the front than that. ”

"Really? Oh yes. I remember to bring the twin guns in my lab. The hand that stretched out seemed to be about to take a rice ball was ruthlessly knocked off, and Otto could only find another topic.

"The one from last time? I remember it's called the 2nd Relic or something."

“……”

“……”

"Then bye-bye," Karen, who had finished eating the rice balls, stood up, dusted off her body and prepared to leave.

"Hey, Karen. Don't die," Otto said, a few meters apart. Then he threw something at the other person.

"Don't give me a flag, hehe! What is this" Karen asked Otto, who caught the flying object, but turned her head and said that the bench was empty.

"What's this...... This is...... Ring?!! ”

The silver ring lying in the palm of his hand shimmered in the moonlight......

Stupid fox, I don't believe that you can snatch my fiancée with a clear conscience.