Thatteem Mutteem written update, June 30, 2018: Arjunan is in trouble

In the latest episode of Thatteem Mutteem, Arjunan is seen taking a selfie in front of his house. Kamalasanan observes this and questions him what he is trying to do.
Arjunan requests Kamalasanan to click a picture of him keeping the house in the background. Mohanavalli also questions him what he is doing. Arjunan replies that he has turned 15 years old still people are questioning him.
Arjunan informs Kamalasanan that he is going to the school to attend alumni meeting and he feels like a 15 year old boy.
Mohanavalli complained Amma about Arjunan.
Arjunan gets ready and bids them goodbye.
Arjunan meets his childhood friend Sisili in school and he recollects memories about their school days. Arjunan confesses about the feelings he had during school days. Both exchanges numbers and Arjunan says that he will send her a new poems.
In the night, Arjunan is seen chatting with Sisili through WhatsApp. He sends her voice messages and texts. Mohanavalli finds this out and shouts at him. She doubts that Arjunan is in love with Sisili and Mohanavalli cries that she is going back to her home.
In the morning, Mohanavalli decides to go to her home and the whole family tries to stop her. Kamalasanan promises that he will find a solution to this problem.
Sisili and her husband reaches Arjunan's house and shouts at Arjunan. Sisili's husband questions Arjunan why he was sending messages to his wife.
Arjunan clarifies that they are not in love but very good friends. He also says that they got excited to see after years and was talking out of the excitement. Mohanavalli apologizes to Arjunan for misunderstanding him.