English diary 【13th time】

●Before correction by Chat GBT
Today is Sunday. Yesterday, I went to Lalaport in Koshien with my wife.
Lately, I'm not interesting in fashion, but I could buy L.L Bean T-shirt for I found something good after a long time. I'm might be more interested in fashion due to this purchase. Now, I want to buy other simple T-shirt like Champion’s reverse weave next month. 
Today, I'm going to climb Rokko mountain with my wife.  
Thank you for reading 13th English diary.  

●After correction by Chat GBT
Today is Sunday. Yesterday, I went to Lalaport in Koshien with my wife. Lately, I haven't been very interested in fashion, but I found a good L.L. Bean T-shirt, which piqued my interest after a long time. Perhaps due to this purchase, I might become more interested in fashion. Now, I want to buy another simple T-shirt like Champion’s reverse weave next month. Today, I'm going to climb Mount Rokko with my wife. Thank you for reading my 13th English diary.

●Summary of corrections

1. Added "haven't been" for smoother tense consistency in the sentence about fashion interest.

2. Clarified "which" to refer to the L.L. Bean T-shirt.

3. Removed "I'm might be" and replaced it with "Perhaps due to this purchase," for clearer expression.

4. Changed "Rokko mountain" to "Mount Rokko" for standard naming convention.

5. Added "my" before "13th English diary" for possessive clarity.