For a speedrun walkthrough, you can skip texts. So before you start, here's how to do it:

✧ Go to [Config]
✧ Set [Text Display Speed] to Fastest
✧ Set [Skip Mode Setting] to [All Text]
✧ Set [Continue Skip After Choices] to [ON]

✧ Please enter your name (Anything will do.)
✧ Yes
✧ No reason to refuse

✦ [Save 1]

✧ Help Ayame

✦ [Save 2]

✧ Maybe a yakitori......
✧ O-okay......I guess Ill take you up on your offer
✧ Ayame......Can I ask you?
✧ I enjoy being with you, too, Ayame

⭐ Ayame END Achieved ⭐

✦ [Load Save 1]

✧ Help Kaede
✧ Maybe an ice cream......
✧ O-okay......I guess Ill take you up on your offer
✧ I would like to ask you......Kaede
✧ I enjoy being with you, too, Kaede

⭐ Kaede END Achieved ⭐

✦ [Load Save 2]

✧ Maybe an ice cream......
✧ O-okay......I guess Ill take you up on your offer
✧ Ayame......Can I ask you?
✧ I enjoy being with you, too, Ayame

⭐ Ayame & kaede END Achieved ⭐

⭐⭐⭐ 100% Steam Achievements Completed ⭐⭐⭐
⭐⭐⭐ All Gallery Pictures and Memory Completed ⭐⭐⭐

FYI, another possible route for both Ayame & Kaede:

✧ Please enter your name (Anything will do.)
✧ Yes
✧ No reason to refuse
✧ Help Kaede
✧ Maybe a yakitori......
✧ O-okay......I guess Ill take you up on your offer
✧ I would like to ask you......Kaede
✧ I enjoy being with you, too, Kaede

Thanks for viewing the guide! I hope it helps!