Doomsday: The Big Shot Comes from the Stars

Strong heroine + the male lead falls for her on his own + 1v1 Su Yu is a future interstellar expert in biology and advanced weapons development. As the few crops remaining in the galaxy increasingly mutate and contamination levels rise, the Federation invests heavily in building a time ship. Its mission is to send agricultural experts back to an era of plentiful crops to collect lost seeds and cultivation methods. But an accident occurs, and Su Yu, the one who built the time ship, is sent back in time. Worse, she doesn't arrive in the era of abundance, but in the apocalyptic years that came before it. Su Yu: ... But for the sake of the galaxy's future, she has no choice but to bring the agricultural expert's robot and complete the mission in their place. Su Yu: Is this a seed? Agricultural robot: I don't know either. But I've seen that man in the agricultural history books. He's the pioneer of the era of abundant crops! We can ask him whenever we don't know something! Su Yu: ... She'd forgotten that interstellar agriculture was so far behind that an agricultural robot couldn't even tell what crop a seed belonged to. So, careful not to interfere with history or the pioneer's life, she quietly followed the man. * Gu Huai's life has been smooth sailing. He's been handsome since childhood, always ranked first in his grade, and became the youngest academician at the Agricultural Research Institute after graduating from university. Even when the apocalypse broke out, he smoothly awakened water- and wood-type abilities, joined a powerful team, and then a powerful base. His whole life has gone according to plan. His one and only problem is that Su Yu doesn't like him.